At the Action Department Store, a tournament is taking place - the Quantum Battle. The grand prize in the tournament is some tickets to a wonderful spa! Mommy would do anything to go on this amazing trip, so she tells Shin-chan: "If you win the grand prize in this tournament, I'll get you anything you want, Shin-chan!" "Whooaah! I wanna get one of those Playboy Mummies to lift me up, real high!" Convinced that he'll get this, and unsuspecting Shin-chan aims for victory in the tournament.