In this exciting adventure based on the second Fu-Manchu novel, intrepid sleuths Nayland Smith and Petrie investigate a haunted house, but get more of a fright than they expected. Caught by the evil Dr Fu-Manchu, Nayland Smith faces a plague of ravenous Cantonese rats - a torture known as 'The Six Gates of Joyful Wisdom'. Will Petrie end his agony, with the razor-sharp ‘Friend’s Sword’?

Fu-Manchu’s slave girl Karamaneh leads sleuths Nayland Smith and Dr Petrie to her evil master’s lair, where they fall prey to another of the Devil Doctor’s traps. Bound hand and foot, they watch helplessly as a party of policemen are imprisoned in a subterranean vault and poisoned with vile fungal spore vapour, while Fu-Manchu cackles with maniacal glee. Can our heroes escape to save the day?