 Princess Ling Moy, a young and beautiful Chinese aristocrat lives next door, unbeknownst to her, to Dr. Fu Manchu, a brilliant but twisted genius who is out to rule the world. She is involved with Ah Kee, a handsome young man, who also unbeknownst to her, is a secret agent out to thwart the heinous plots of Fu Manchu. As it turns out, Fu is not only her next-door neighbor, he is also, (unbeknownst to her), her father. When she finds out, will she take her father s part and fight the men out to get Fu, or will she become a brave heroine and save the world even if it is from the devious doings of her own Dad? Yes, it s dated, and there isn t nearly enough of Warner Oland in it; but it moves along well, has a lot of action, Wong and Hayakawa were fine actors, and if you re a Charley Chan fan, it s worth it to how much, if any, of Fu Oland used when creating Charley Chan.