Simeon Lee, a wealthy but tyrannical patriarch, invites his estranged family to his estate for Christmas. His guests include his sons, their wives, and a mysterious visitor named Pilar Estravados. However, tensions rise as old grievances resurface, especially since Simeon delights in manipulating his relatives.

On Christmas Eve, a horrifying scream is heard, and the family rushes to find Simeon Lee brutally murdered in his locked bedroom