Cal has always lived in the half dark, her life shrouded by secrets she longs to know the answer to. But on the day she set off to uncover the truth she is swept up in a current of strange events. Drawn into her fate-stream are merciless predators and improbable friends; Orcara, the kelpish healer, mysterious Tarian who trades in power and knowledge, and Jake, a boy as lost and hunted as Cal herself. Who can they trust? Who should they fear?