Preparing to watch the Famouse Fjord Race, mouseking Geronimo Stiltonord, a family member from the ancient far north, is dragged onto a boat, despite his lack of sailing skills, before learning that the dragons are preparing for another attack.

As Benjamin Pratt and his friends Jill and Robert continue their efforts to save their school, they find themselves dodging two evil janitors, Lyman and Wally, but their team has also grown and now has a secret fund of millions of dollars.

"Weatherby is a fish out of water. When she lands a scholarship to the prestigious Boston School, she's excited to be in the same world as her dad, whom she's never met, and make real friends. But Weatherby has a secret she'll risk everything to protect, one that could destroy her new life. Every member of Jack's wealthy and privileged family has made their mark at the Boston School. Everyone, that is, except for Jack, who is entirely mediocre. He's...