A young Aboriginal boy disappears while out on a diving trip with his sister, Maruul. No one can work out what has happened to him, for Maruul has blocked from her memory the terrifying truth.
PC McPhee is a boy determined to unravel the events leading up to the disappearance. But investigating a ghastly ship of horrors while besieged by the deadly creatures of the deep is no job for the faint-hearted.