The skinny-dipper sightings from the deck of Denny Traeger's commuter ferry fast-track from mere curiosity to a hell-ride. Is his "Streaker" the spirit of a seahorse-tattooed lady water taxi driver who drowned seventeen years ago in his teenage estuarine playground on the very day he has a complete memory blank? His quest to find out pits him against his shrink, Dr Laura Schebel, who is treating him for dissociative amnesia causing sexual dysfunction. Also against mystery assassins. And against cold case detective, Cassandra Koh, who suspects him guilty of this and another murder the same night ... of a young boy ... by a paederast. His struggle for answers triggers the gut-wrenching recall of his missing day and the traumatic event that caused it. Peaking with a confrontation that leaves him fighting for his life.