Sammo dons a Santa suit to discover why thieves, also dressed as St. Nick, are stealing a popular holiday doll from various toy stores. He also becomes obsessed with finding a missing boy, after the kid's brother tells him that all he wants for Christmas is to have him home again.

Sammo is forced to take a vacation, but instead of relaxing he drives a cab for an ailing neighbor and picks up a passenger who is soon murdered. Meanwhile, Terrell, Grace and Amy try to track down the leader of a crime ring.