Set in modern day Buenos Aires, the film centers around a relationship between two emotionally crippled roommates. Adrian LeDuc (Colin Firth) is a lonely sociopath. Jack Carney (Hart Bochner), the new roommate, appears normal enough at first but it soon becomes apparent that he is hiding something. As their friendship develops, Adrian suppresses his suspicions that Jack may be the government mercenary turned serial killer who has been terrorizing the city. The shocking climax of this twisted tale of deceit, perversion and murder reveals the darker side of the human psyche.