Kaii Haku has lived his whole life in the shadow of his cruel father’s magic. Rebelling against his father- the Bone Master- by drinking and sleeping around was Kaii’s main occupation for years. But when one of his best friends is kidnapped by pirates, Kaii embarks on a perilous rescue mission with two retired pleasure house workers, a shy teen bookworm, and a feisty girl from the pirate crew. The journey will take Kaii and his allies far from Achten Tan, to a sea ruled by dangerous conditions and ships that travel on the backs of monsters. For the first time in his life, he has the power to make a difference, but if he wields his emerging bone magic to save the girl he loves, he risks losing himself and becoming like his father – a man who tried to kill him.