When Geronimo's fears begin taking over his life, Thea and Trap decide to cure him by taking him to the jungle, where he must eat bug soup, swim in raging rivers, and even wrangle snakes.

When Geronimo Stilton, editor of "The Rodent's Gazette," gets a mysterious phone call from his cousin Trap, he takes Thea and Benjamin along to Transratania, believing that Trap is awaiting rescue somewhere in the castle of Count von Ratoff.