PrincessLingMoylivesnextdoortothePetriefamily,andisromanticallyinvolvedwithAhKee,asecretagentdeterminedtothwartFuManchu.ItisrevealedthatFuManchuisLingMoy’sfather.AtherChinesefather’sbidding,PrincessLingMoygoestomurderanenemyandmeetsaScotlandYarddetective.