Karamenah, the slave girl, promises that Fu Manchu shall be given into Nayland Smith and Dr. Petrie's hands if only they will save her brother, Aziz. She leads the two men in company with Weymouth to the Chinaman's haunt, forces them to carry out her brother and then shows them Fu Manchu, asleep, at the same time begging them not to enter his room. The three adventurers promptly disobey, with the result that they fall through a trap in the floor. Together with Karamenah, the men are bound hand and foot by dacoits, while Fu Manchu gloats. As the police enter one end of the lair, Fu Manchu lowers a glass wall that traps them in a room where large fungi are growing on the walls. The fungi throw off large spores, which poison the trapped police right in front of their three bound comrades. Reinforcements arrive, and Fu Manchu bundles his bound prisoners on a launch, preparing to make his way down the Thames to freedom. The boat is outfitted with a bomb on a time fuse. The evil doctor is about to kill Karamenah when Weymouth breaks loose and begins to struggle with Fu Manchu; both men fall over into the water. The captives are rescued by a police boat before Fu Manchu's bomb can explode. Weymouth, leaving the mandarin to drown, is picked up, but the Chinaman is safely washed ashore. (Screening 3/6/2004 at Cinefest Film Festival, Syracuse NY)