I am Legend stars Will Smith as Dr. Robert Neville, a military virologist living in New York City in 2012, who is the last known survivor of a worldwide viral epidemic called KV that has infected or killed nearly all of earth's population. KV, originally developed as a cure for cancer, caused severe side effects in test patients which resulted in mutations as well as physiological and biological changes in the human body structure. Humans infected with KV have become nonsensical, irrational, and bloodthirsty nocturnal monsters that will hunt, mutilate, and devour any living thing that is not also infected. KV proved to be highly contagious and became airborne at its epicenter in New York City. For some reason, Neville is one of the small percent of humans which is immune to KV and this allows him to traverse the empty streets and buildings of NYC without worrying about contracting the disease.
The film focuses heavily on Neville's methods of survival and his noticeably deteriorating psyche. When he is not preoccupied with seeking basic necessities, Neville works in his basement lab attempting to develop a vaccine for the disease. Will Smith does a superb job of portraying Neville's solitary character, who everyday is searching for solutions to the problems in his future as well as the future of mankind. Smith's acting is the highlight of the film and is really the driving force that could have actually made this film legendary.