A bitter and estranged family comes together for Christmas Eve dinner and a game of Secret Santa, hoping to heal old wounds, put their past behind them, and renew their love as a family. However, the night soon turns more bitter, more vulgar, more violent, as angry accusations, threats, and outbursts start to fly, followed by bloody clashes, injuries, and murder. Most of the family members have gone completely insane and murderous. Will anyone make it out alive and unscathed, and figure out the mystery behind this shocking, blood spilling ordeal?