I Am Legend recap

After a plague turns nearly everyone around Los Angeles into vampire-like beings, Robert Neville survives alone in a fortified house. He spends his days killing infected people while they lie dormant and his nights resisting the crowds outside, including his former neighbor Ben Cortman. Memories of his wife and daughter deepen his isolation. Neville teaches himself biology and identifies a bacterium behind the condition, explaining many traditional vampire traits. A stray dog briefly gives him hope but dies of the infection. He later meets Ruth, who appears uninfected; she is actually part of a community of living infected people whose medication controls the disease. Their agents capture Neville because his daylight killings have made him a mass murderer in their eyes. Awaiting execution, he realizes that their society is the new normal and that he is now its feared monster. Ruth gives him poison, and he dies understanding that his story will survive as a legend.

Robert Neville appears to be the only uninfected person left in a Los Angeles suburb after a plague. He has converted his home into a refuge protected by garlic, mirrors, boards, and other defenses. Each night infected people surround the house, trying to lure or force him outside; among them is his former neighbor Ben Cortman. During daylight the attackers become helpless, so Neville searches buildings, destroys those he finds, gathers supplies, and maintains his house before sunset. His routines keep him alive but also expose his profound loneliness, anger, and reliance on alcohol. He has observed that the infected resemble the vampires of folklore, yet he has no reliable account of why they changed or why familiar defenses affect them.

Neville's present routine is interrupted by memories of the epidemic and of his wife, Virginia. As sickness spread, public measures became increasingly brutal and the dead did not always remain dead. Virginia fell ill despite Neville's efforts to protect her, and grief drove him to acts that showed him the old rules no longer applied. His recollections clarify why the nightly attackers are not an abstract enemy: they include people he knew, led at his door by Ben Cortman. Determined to replace superstition with an explanation, Neville begins seeking medical and scientific information. He suspects that the plague, not magic, is responsible for both the physical condition and at least some of the infected people's reactions to traditional symbols.

Neville studies biology, equips a crude laboratory, and examines blood samples. He identifies a bacterium associated with the vampire condition and develops explanations for symptoms that once seemed supernatural. Some weaknesses have physical causes, while others depend on the beliefs held by an infected person before the plague. He also realizes that the infected are not all alike: some are living victims of disease, whereas reanimated corpses behave differently. The distinction unsettles the moral certainty of his daytime campaign, even though he remains under nightly siege. Scientific understanding gives structure to his life, but it does not restore companionship or undo the deaths of his family.

Years of solitude have made Neville nearly mechanical until he notices a stray dog moving about in daylight. He gradually leaves food and tries to make his presence nonthreatening, investing enormous hope in the possibility of another living creature's trust. He finally manages to bring the sick animal into his house, but discovers that it too is infected. Despite his care, the dog dies. The brief relationship breaks through Neville's emotional defenses and leaves him grieving again, yet it also proves that his need for connection has survived his isolation.

Neville sees a woman named Ruth walking in daylight and pursues her when she runs. At his house she claims to have survived the plague and lost her husband, but Neville doubts her story and tests her blood. Ruth is infected, though she can tolerate daylight, and she subdues him before leaving. In a note she explains that living infected people have formed an organized society and use treatment to control the bacterium. She had been sent to investigate Neville because his systematic killing included members of this new community, among them her husband. Ruth warns him to leave before the society's forces come for him. Neville now understands that a humanlike social order has developed beyond his barricades and that it regards him as a dangerous killer rather than a survivor defending humanity.

Neville remains at his house despite Ruth's warning. Armed agents of the infected society arrive, violently destroy the uncontrolled dead outside, and capture him. He wakes wounded in custody and sees that the people beyond his cell fear him. Ruth visits in an official capacity and tells him that the new society intends to execute him; his daylight raids killed living infected people who had families and a developing community. She covertly gives him poison, offering a quieter death than the public punishment planned for him. Watching the hostile crowd, Neville finally reverses his understanding of the world. The infected civilization is no longer a deviation awaiting a human recovery: it is the new social order. He is the last representative of the vanished one, and his unseen entries into their homes have made him their monster. Neville takes the poison and dies with the realization that he will endure in their folklore as a legendary terror.

Ruth's warning cannot save Neville from the new society formed by living, infected people who have learned to control the disease. Its armed agents seize him, and he wakes in a prison hospital, badly wounded. From his cell he sees a crowd regarding him with the same fear once attached to supernatural monsters: for years he entered their homes in daylight and killed them while they were helpless, unable to distinguish their organized community from the mindless dead. Ruth, now an official of that society, visits and explains that the old order is gone. She gives him poison so that he can avoid public execution. As the crowd waits outside, Neville understands that he is the abnormal remnant in their world, the terrifying figure whose deeds will pass into their folklore. He takes the poison and dies recognizing that, to the civilization replacing humanity, he has become the legend.