In a place similar to the 1706 Caribbean, two fourteen-year-old "polliwogs"--humans who can walk on water--rely on a mysterious figure known as the Ghost Trader and a band of pirates to help them escape from the evil that is chasing them.

Jolly and Munk start training with Forefather when they discover that their special abilities as "polliwogs" may be the only way to save the city Aelenium from the Maelstrom. In the vast Caribbean Sea, pirates Jolly and Griffin are stranded on a tiny island where a peculiar architect is building an enormous bridge -- but to where? Another world? Before they can find out, the bridge bursts into flames and the kobalins attack. Jolly and Griffin have...