Successful writer Marty Stillwater's (Stephen Baldwin) idyllic life is forever shattered when a mysterious man with his identical appearance suddenly appears claiming to be the real Marty Stillwater... and a series of grisly murders result.After a sample of Marty's blood is accidently used in a top secret military experiment by scientist Drew Oslett, Jr. (Thomas Haden Church), ALFIE, Marty's dual identity, is born. Designed as the ultimate warrior, ALFIE has but one directive: to Kill! From the moment of ALFIE's conception, Marty's wife (Julie Warner) notices dramatic changes in Marty's behavior. Not only do Marty and ALFIE share the same DNA, but also a strong telepathic connection which enables Marty to see into ALFIE's dark and terrifying world.Soon Marty and his family are on the run from ALFIE and the police in a deadly and highly-charged game of cat and mouse.