After consulting a fortuneteller, painter Colleen (Sarah Jessica Parker) begins to suspect that her private-eye boyfriend, Dick (Johnny Knoxville), is cheating. When she comes home and finds him packing to leave her, Colleen accidentally kills him. Nervous Irish Mafia hit man Daniel (Harry Connick Jr.), who's been gunning for Dick, arrives shortly afterward and admits he has never successfully completed a job. Daniel proposes to take credit for the murder, and the odd couple fall in love.