Furn is an ordinary, feeble boy on board the Labyrinth, living his life cleaning the ship's decks, until one day, a terrible storm takes place on the water, and blood curdling pirates called Yarleys demand a certain book from the captain. With the captain's daughter kidnapped, and a deadly promise to the Trident King of the sea, Furn gets thrown into the underwater world of The Sea Rider, who teaches him the ways of the water. But is The Sea Rider really who he says he is? Soon Furn learns the true meaning of where courage truly comes from, a binding of trust in those who can't conceal.

Furn is an ordinary, feeble boy on board the Labyrinth, living his life cleaning the ship's decks, until one day, a terrible storm takes place on the water, and blood curdling pirates called Yarleys demand a certain book from the captain. With the captain's daughter kidnapped, and a deadly promise to the Trident King of the sea, Furn gets thrown into the underwater world of The Sea Rider, who teaches him the ways of the water. But is The Sea Rider really who he says he is? Soon Furn learns the true meaning of where courage truly comes from, a binding of trust in those who can't conceal.