 The remaining 0.2% (12 million) of the population are immune to the virus and are the prey of the mutant Darkseekers.Three years after the outbreak, U.S. Army virologist Lt. Col. Robert Neville lives an isolated life in the deserted ruins of Manhattan, unsure if any other uninfected humans are left.Neville's daily routine includes experimenting on infected rats to find a cure for the virus, searching for food and supplies, and waiting each day for any immune humans who might respond to his continuous recorded radio broadcasts, which instruct them to meet him at midday at the South Street Seaport.