All Rerun wants from Santa is a dog, but his mother won't let him have one. Spending time with Snoopy provides the perfect pick-me-up. But when Snoopy gets too busy to play with Rerun, they call in a substitute—Snoopy's brother Spike.

After one of his class papers is stolen and turned into a movie, a young student and his best friend exact a hilarious, slapstick revenge on the Hollywood hot shot who has taken credit!