On what should be the happiest night of her life, Grace, played by Samara Weaving, finds herself playing a deadly game. After marrying her charming fiancé Alex, portrayed by Mark O'Brien, she is welcomed into his obscenely wealthy family with a peculiar tradition: a random game at midnight. Grace draws "Hide and Seek," but the playful hunt quickly turns into a terrifying fight for survival as her new in-laws, including the matriarch Becky Andie MacDowell and patriarch Tony Henry Czerny, arm themselves with crossbows and axes, believing her sacrifice is essential to preserving their fortune. Blending brutal horror with sharp, dark comedy, the film follows Grace as she navigates the labyrinthine estate, discovering the family's macabre secret while trying to survive until dawn. This thrilling and bloody satire explores just how far one will go for love, legacy, and a truly killer wedding night.