This gripping adventure takes readers to an incredible world where powerful shark clans rule, and competition for territory is fierce. For millions of years, shark clans, or shivers, have presided over the ocean world. But with food becoming more and more scarce, times are harsh, and shivers must battle each other for power. Young Gray has grown up in a peaceful reef, but after misbehaving one too many times, he is banished by his shiver, and must move into the dark and dangerous ocean waters. There, Gray and his best friend, Barkley, struggle to survive a treacherous world where vicious sharks will do anything to win control of the waters. For in the end, only one shark can rule the ocean!