A naval vessel discovers a derelict schooner in the south seas. Everything aboard the ship appears and order, but the craft is completely deserted. The mysstery deepens when not one but two salvage parties put aboard the craft also disappear. It appears the mystery might be solved when a survivor from the schooner is found adrift in a dory. The survivor gives an account of mutiny, murder and piracy, but can only hint at an even greater mystery.
