When Mrs. Claus dies in a tragic toy accident, Santa vows to make all those little brats pay! But when his rampage kicks off at the home of FBI agent Ellie Tewksberry, he's messed with the wrong lady. Mama Bear will travel to the ends of the earth to save her son-even if it means teaming up with the Easter Bunny, the American Santa Society (A.S.S.), and her wannabe-elf ex-husband. This December, Santa must die!