After having spent many years working as an assassin for the New York Underworld, Chris Richardson decides to leave that life behind her, fed up with the killings and bloodshed. Setting out to begin a new life with her lover, she quickly finds out that once you're in, you never leave.

MR. D is a killer. A cold, calculating, brutal gun for hire. A rising star in the Mafia, he is sent from his home in New York to the suburban home of Chris and Genie Richardson, to take care of some urgent business. Unfortunately, the mark isn't home and Genie Richardson is left all alone with Mr. D and his gun.