The four daughters in a dysfunctional family are called back to the ol' homestead by their ailing father so he can ask them for a favor. Turns out the old coot has grown paranoid and thinks his new wife is slowly poisoning him. His request? He wants his kids to kill her for him. The ladies think the old man has lost his marbles, but when a crazy loon in a yellow raincoat starts killing people, suddenly his paranoia doesn't seem too misplaced.