Across the Seventeen Seas lies a world filled with spies, ship battles, and secrets....

For many years, a curse has condemned Captain Mousebeard, the feared mousehunting pirate, to a life at sea, never to set foot on dry land. But the dastardly Isaiah Lovelock, Mousebeard's mortal enemy, is growing in power, and only Captain Mousebeard is brave enough to stop him.

In order to stand a chance against Lovelock, the fearless Emiline and her friends-now fugitives themselves- must help the captain break the curse before his fate is sealed forever. Their adventure takes them to Norgammon, a mythical land of lost mice. There, they are introduced to a wonderful and dangerous assortment of mouse species, and a terrifying battle awaits them.

Will Emiline and her crew be able to escape their enemies' claws unscathed?