Cold Days recap

Alive again after his months-dead interlude, Harry Dresden completes a brutal recovery at Arctis Tor and begins his service as Mab's Winter Knight. Her first command: kill Maeve, the Winter Lady - an immortal. In Chicago, reunited with Toot, Bob, Butters, Molly, Thomas, and a wary Murphy, Harry is summoned by Demonreach and learns the island is a prison built by Merlin for thousands of horrors, and that a ritual attack now under way will blow it open within days, destroying the region and freeing everything inside. The trail runs through Sidhe hit squads, Summer's suspicious Knight and Lady, and an audience with the Mothers, where Harry learns the war under everything: Winter's armies hold the Outer Gates against the Outsiders, whose contagion - Nemesis - can secretly subvert even immortals. On Halloween night, when immortals can die, Harry claims leadership of the Wild Hunt and turns it against the Outsider-led assault on the island. At the well, Maeve is exposed as Nemesis-infected - she can lie - and the attack is hers. Maeve kills Lily, the Summer Lady; Murphy kills Maeve; and the mantles pass: Molly becomes Winter Lady, and Sarissa, revealed as Maeve's twin, becomes Summer Lady.

Previously in the series: to save his daughter Maggie from the Red Court of vampires, Harry Dresden sold himself to Mab, Queen of Air and Darkness, as her Winter Knight - then destroyed the entire Red Court at Chichen Itza by turning their own bloodline curse against them, killing the newly-turned Susan Rodriguez, Maggie's mother, on their altar by her own choice. Hours later Harry was shot and fell into Lake Michigan, and the world believed him dead. The truth, uncovered while his spirit walked Chicago as a ghost: Harry had arranged his own assassination rather than live as Mab's corrupted enforcer, hiring the mercenary Kincaid and having his apprentice Molly erase his memory of the plan - a choice nudged by a fallen angel's whisper, as the archangel Uriel revealed. His body never died: Mab and the island of Demonreach - the sentient place Harry is bonded to as warden - preserved it while his ghost solved his own murder and helped destroy the necromantic Corpsetaker. In his absence the Fomor rose to fill the Red Court's vacuum, Molly broke herself fighting them as the vigilante Rag Lady, and Murphy led Chicago's ragged defense. Maggie lives safe with the Carpenter family, not knowing her father survived. Harry woke on Demonreach with his debts intact: he is the Winter Knight, and Mab's service is about to begin.

Harry recuperates at Arctis Tor, the heart of Winter, under a regimen only Mab would prescribe: months of physical therapy punctuated by her personal attempts to kill him, each one a lesson in staying alert, ruthless, and alive. The mortal aide Sarissa - composed, careful, and a veteran of the Winter Court's lethal etiquette - guides him through his recovery and warns him, mostly by example, how one survives among the Sidhe. On Halloween night, Harry's birthday, Mab throws a gathering to present her new Knight to the assembled monsters of the Winter Court, a party where every courtesy is a test and every guest measures him for weakness. Maeve, the Winter Lady, greets him with mockery and venomous games, making plain both her contempt and her interest. Harry navigates the court's provocations without being killed or owned, which counts as success. Then Mab issues her first command to her new Knight, and it redefines the word impossible: Harry is to kill Maeve - her own daughter, the Winter Lady, an immortal queen of Faerie. No explanation is offered; Mab, Harry knows, cannot lie but can withhold nearly anything. With that hanging over him, Harry is released back to the mortal world, and home to a Chicago that buried him more than a year ago.

Chicago again - as a dead man. Harry surfaces carefully, reconnecting first with the allies least likely to shoot him: Toot-Toot and the pizza-fueled Za-Lord's Guard, then Butters and Bob. The skull briefs him on the fine print of his new existence: the Winter mantle is not a costume but a current, feeding him strength while nudging him constantly toward predatory cruelty - the same slow corruption that ruined every Knight before him - and the fight to stay himself will be daily and unending. Bob also explains what Mab's command actually requires: true immortals cannot simply be killed, which makes the assignment either a trap, a test, or a puzzle with a missing piece. The reunions get harder from there. Molly, sharper and steadier than the broken girl of a year ago but marked by what that year cost, joins him without hesitation. Thomas gets his brother back with the Water Beetle and dry understatement. And through it all a summons keeps pulling at the edge of Harry's awareness, growing from suggestion to demand: Demonreach, the island he is bonded to as warden, wants him - now. Something out on the lake is wrong, and the island does not call for small reasons.

On the island, the genius loci - manifesting as a hooded presence Harry dubs Alfred - finally shows its warden what he is warden of. Demonreach is a prison: built ages ago by Merlin himself, anchored beneath the lake, holding in its cells thousands of entities too dangerous and too durable to destroy - old gods, nightmares, things with names wizards do not say. And the prison is under attack. A ritual working, already in motion, is driving toward the island like a slow spearpoint; when it lands, it will rupture the containment in an eruption that will devastate the region and free what is caged. The island can name neither the attacker nor the exact hour, but the window is days, not weeks. Ashore, the opposition starts arriving in person: Sidhe killers, among them the ancient murderer called the Redcap, test Harry in the streets, and Fix, the Summer Knight - an old friend wearing his court's fears - warns Harry off with an edge that says Summer believes something terrible about the new Winter Knight. Harry, juggling an impossible assassination, an incipient cataclysm, and courts that each think he serves the other's corruption, begins to suspect that all of it - Maeve, the island, Summer's dread - is one problem wearing several faces.

The shape of the real war comes into focus. A parley with Lily, the Summer Lady, lays out Summer's terror in the open: a corruption is moving through the courts of Faerie, invisible and patient, turning trusted beings into instruments - and Summer fears Winter, Mab, and Mab's new Knight are already its property. Then Harry is snatched out of the world entirely, hauled through the Ways to a cottage that holds the two most ancient powers of Faerie: Mother Winter and Mother Summer. From them, and from what Mother Summer shows him, Harry finally sees the map. At the far edge of reality stand the Outer Gates, and beyond them the Outsiders - the devouring things from beyond creation - press an eternal siege. Winter's vast armies, Mab's endless cruelty and conscription, exist for exactly this: garrison duty at the walls of the universe. And the corruption Summer fears has a name - Nemesis, the adversary, an Outsider contagion that infects minds and cannot be detected from outside, capable of suborning even immortals. Suddenly Mab's unspeakable command makes a terrible kind of sense, and so does everyone's suspicion of everyone: anyone - a Lady, a Knight, a friend - could already be carrying the enemy inside them, and the attack on the island's prison is exactly the kind of catastrophe Nemesis exists to arrange.

The clock runs out on Halloween night - which, Harry learns, is precisely the point. On Halloween, immortals who walk the mortal world set aside some of their immortality; it is the one night beings like the Ladies of Faerie can truly die, and the only night Mab's command could ever be carried out. It is also the night the ritual spear aimed at Demonreach will land. Harry gathers his crew - Murphy, Thomas, Molly - and runs for the island through weather and worse, the enemy throwing killers at them the whole way; even Mac, the eternally neutral barkeep, takes a bullet in the escape. Out on the water the night's other power finds them: the Wild Hunt, the ancient host that rides each Halloween, led by the Erlking with Kringle himself among the riders, and being its quarry is a death sentence. Harry does the insane, lawful thing: he defies the Hunt and fights, and by the Hunt's own iron customs his defiance earns him more than survival - Harry Dresden ends the night leading the Wild Hunt. With a host of legend at his back, he turns toward Demonreach, where the true assault has begun: Outsiders coming up out of the lake against the prison's shores, led by a rag-shrouded herald his allies call Sharkface, with mortal cat's-paws and turned Sidhe among them.

The battle of Demonreach rages from the shores to the island's hidden heart. Harry's Wild Hunt smashes into the Outsider assault while his friends fight beside him, and Sharkface - the herald who has dogged and poisoned the whole affair - is destroyed. But the true attack was always the ritual, and at the well of the prison the architect stands revealed: Maeve. The Winter Lady herself is the spear-point driving toward the catastrophe, and when the confrontation comes - Mab arriving in wrath, Lily and Fix present with Summer's fears, Harry and Murphy and the survivors of the night ringed around - Maeve settles every question about her nature by doing the one thing no Sidhe can do. She lies, smiling, and everyone present understands: Nemesis has her, and has had her, and Mab's unspeakable command was a mother's only lawful move against a daughter already lost. What follows takes seconds. Maeve, given her moment of theater, murders Lily - the Summer Lady dies at the hands of Winter's - and before Maeve can add to the count, Karrin Murphy puts a bullet through her head. On Halloween night, immortality suspended, both Ladies of Faerie lie dead on Demonreach, and their power does not simply vanish: mantles must go somewhere, and there are mortal women standing in the circle.

The mantles choose their vessels. Winter's falls on Molly Carpenter, Harry's own apprentice, who becomes the new Winter Lady - a transformation neither she nor Harry can undo, and whose weight Harry immediately understands as one more price of his service that someone else has paid. Summer's falls on Sarissa, who is revealed as far more than Harry's patient rehab aide: she is Mab's other daughter, Maeve's twin, raised mortal and hidden in plain sight at the heart of Winter - and she leaves for Summer's court as its new Lady, carrying no great love for the Knight who dragged her into the night's events. The island holds. The prison's cells stay sealed, the region does not burn, and the Outsiders' spear is broken - this time. Harry ends the book with his ledger rewritten: still Winter Knight, still warden of a prison full of horrors that the adversary now has demonstrably tried to open; newly educated in the war beneath everything, where Winter's legions hold the Outer Gates and Nemesis can wear any face, including a friend's. Mab's cruelty has not become kindness, but it has acquired context. Murphy and Harry, after years of almosts, finally say out loud what is between them and choose to try. And inside Harry's skull the parasite that has been splitting his head with pain all book keeps growing - Mab makes clear it will kill him, in time, and that the subject is not closed.

The assault on Demonreach is broken and the prison holds, but the cost is paid in queens. At the island's heart Maeve reveals the truth Mab could never speak plainly: the Winter Lady is infected by Nemesis, the Outsiders' contagion - proved when she does what no Sidhe can do and lies. In the final confrontation Maeve murders Lily, the Summer Lady, and an instant later Karrin Murphy shoots Maeve dead - Halloween night being the one time an immortal walking the mortal world can truly be killed, the entire reason Mab's command and timing were what they were. The vacated mantles pass to the nearest fit mortal vessels: Molly Carpenter becomes the new Winter Lady, and Sarissa - revealed as Mab's other daughter and Maeve's mortal-raised twin - becomes the new Summer Lady. Harry ends the book still Winter Knight and still warden of Demonreach, now knowing what the island truly is: Merlin's prison for horrors, which Nemesis just tried to blow open. He also carries the larger map: Winter's armies exist to hold the Outer Gates against the Outsiders, Mab's cruelty serves that war, and the adversary can wear anyone. Murphy and Harry have finally admitted what is between them. And the parasite in Harry's head - the source of his crippling headaches - remains, growing, with Mab making clear it will kill him in time.