Cosmoe the Earth-boy and his space-adventuring partners, Big Humphree and Princess Dagger, return--just in time to save the galaxy ... Crostini's Cosmic Carnival is a strange, monster-filled space train that travels the galaxy. When Cosmoe catches the attention of the carnival's ringmaster, the Neon Wiener, hot-dog-selling spaceship, becomes part of the show. Cosmoe is now known as Cosmoe the Monster-Tamer--and he's a hit across the galaxy! Just one problem--Cosmoe and his buddies are in some serious danger, and not only from the wild monsters Cosmoe's facing in the ring. Can they save the day and still sell enough wieners to keep Galactic Hot Dogs in business?