Make room for daddy—it's a Stepfather's Day special! Terry O'Quinn is a mild-mannered all-American dad with traditional 'Leave It to Beaver' values and a penchant for murder. A master of disguise, Terry dices up the families he ingrains himself in for minor infractions and disappears without a trace, only to repeat the cycle with another vulnerable family. Now married to widowed Shelley Hack, things start falling apart when his troubled stepdaughter, Jill Schoelen, begins researching his past because nobody that realized Mr. Ed wasn't actually a horse that could talk until high school is sane. With a rogue therapist and the vigilante known as 'The Discipliner' hot on his trail, it's only a matter of time before The Stepfather™ is backed into a corner asking, "Who am I here?" Slip on your flannel jacket, throw your suitcase full of evidence into the ocean, and whistle a little Camptown Races, because we're moving in with The Stepfather!