Gulliver Queen, nephew of the famous detective, Ellery Queen, doesn't want to be a detective. But when Gully and his new friend, Fisty Jones, investigate the strange underwater noises in the Hudson River, they suddenly find themselves deep in a mystery that Gully can't resist tackling. The menacing tattooed man, the weird one-eyed figure in the abandoned building, the strange but merry Magnus Merlin, magician extraordinaire-all add up to an exciting tale of danger and suspense on and under New York's waterfront.