READY OR NOT follows a young bride (Samara Weaving) as she joins her new husband's (Mark O'Brien) rich, eccentric family (Adam Brody, Henry Czerny, Andie MacDowell) in a time-honored tradition that turns into a lethal game with everyone fighting for their survival.

John Milton is up against the clock: Jonah King, the leader of a Satanic cult, has murdered Milton's daughter and kidnapped her baby. In three days, King and his followers will sacrifice the child at midnight. Milton picks up the trail in Oklahoma as well as rescuing a waitress named Piper from her brutal, two-timing fiancé. There are odd things about Milton: his driver's license is out of date, he has a very strange gun, and he's being pursued by a man in a suit who carries FBI ID and calls...