The islands of the Caribbean Sea. Tiberio, an astonishing junk dealer, runs a store selling bits and pieces of wreckage fished here and there... A certain Jeff, a sailor with a passion for the bottle... "works" with Tiberio, perfecting old maps showing ships with precious cargoes lying around. Jeff is attacked with a machine gun by "the sea lice" gangsters led by a certain Nero, in the service of a disturbing character, Denniger, who haunts the area aboard his yacht. A young local doctor, nicknamed Doctor Caraïbe, comes to Jeff's rescue.