Cardwell Bates tries to steal his wife's gem, "The Sultan of Singapore" in order to pay off his debts. Michael Krugor, who instigated the robbery, plays murderous chess with Dr. Fate.; A man with no head runs a torture and blackmail racket.; Thieves invade a castle in search of a hidden treasure.; Aquaman gets caught up in a salvage operation to retrieve sunken treasure.; Dr. Clever uses a ray to give one of his henchmen super speed.; A criminal breaks into the police bands to leave clues in rhyme.; Cliff gets captured by the Japanese in China.