A small-time bank robber in a stolen Santa Claus costume is chased into an electric billboard, gaining miraculous powers. He becomes Multiple Santa, a villain able to create electric clones of himself. The Tick, Arthur, and their superhero friends are called upon to rid The City of this Christmas menace.

Sister and brother performers, Fred and Soren, beg for Arthur's help after their dolphin, Mr. Smarty Pants, is kidnapped by The Cult of the Fin, which has sinister plans for Reno, Nevada.