On Christmas Eve, a mother controls the anxiety of her little daughter Carrie Ann for Santa Claus and puts her to bed. Then she comes to the living room and kills her husband, hitting his head with a fireplace poker, expecting to receive his life insurance and stay with her lover. While she is dumping his body on the yard, the dangerous patient of a mental institution dressed like Santa Claus attacks her but she succeeds to escape and lock the door. However, she is unable to call the police since the body of her husband is in the front yard. Out of the blue, Carrie calls her mother with an unexpected guest.