Martha Beck (Hayek) and Raymond Fernandez (Leto) were America’s notorious "Lonely Heart Killers." Their lethal scam was simple; they would swindle and then viciously murder lovelorn war widows who would answer their proposal ads in which Ray would describe himself as a sexy Latin Lover. Ironically, Ray’s initial introduction to Martha was a prospective mark. But when they met, it was love at first sight, perhaps as a result of their passion for hot-blooded sex and cold-blooded murder. With Martha posing as Ray’s sister, they swindled elderly spinsters and widows of their savings then viciously murdered them in a bloodbath of sexual frenzy. Raymond and Martha believe they’re literally getting away with murder until homicide detectives Elmer C. Robinson (Travolta) and Charles Hildebrandt (Gandolfini) pick up their scent.