When husband and wife Henry and Claudine organise their company's Christmas party in a remote mansion, they expect it to be a night to remember.
But the festive mood quickly turns sour when a sinister gift is unwrapped in the Secret Santa gift exchange.
As heavy snow traps the guests inside the mountainside lodge, it quickly becomes clear that one of the party is out for revenge.
It's no longer just about enduring the evening. It's about making sure you get out alive.