After losing his ship to German raiders in the final days of World War I, Tom Hooper enlists the aid of master diver Sam Manning to retrieve his precious cargo: a fortune in pearls! Retrieving the pearls will prove a perilous task, pitting Hopper and Manning against rogue German sailors, cannibals, and mutinous crewmen out to steal their fortune! J. Allan Dunn has crafted the type of classic adventure tale the pulps were known for.