During a festive Christmas celebration, the matriarch, Diane, gathers her family at their rural home for what appears to be a joyful holiday reunion. Tensions simmer beneath the surface as familial grievances and secrets threaten to disrupt the holiday cheer. However, the atmosphere takes a dark turn when an unexpected stranger named Cletus arrives on their doorstep seeking refuge and introduces himself as someone connected to Diane’s past, bringing with him a history that Diane hoped to leave behind.

The family's initial hospitality turns to horror as deeply buried secrets come to light, and Cletus's presence ignites a series of increasingly violent events. As trust erodes and panic spreads, Diane and her family must confront their own pasts and the terrifying reality that their lives are in imminent danger. The day spirals into a horrific fight for survival, with each family member facing the chaos in their own way, leading to a chilling and catastrophic confrontation.