The 999 finds its next destination destroyed; it was demolished by a planet that travels through the dimensions, smashing other planets. When the 999 lands on this planet, they are confronted by the planet's ruler, Egoterina, who is very mentally unstable. For example, she invites Tetsuro, Maetel and the Conductor to her castle for dinner, but has them jailed when Tetsuro is a slob. Our heroes escape, and Maetel has a duel with Egoterina in which she defeats her, permitting them to depart the planet.