Fu Manchu's daughter Lin Tang dons a disguise and infiltrates the museum. She drops a listening device. Meanwhile, Fu Manchu's henchmen break into the museum's guarded room by entering through the sewer tunnels. However, Nayland Smith and his allies kill the henchmen only to discover that the vault had been emptied by Professor Gaskel earlier ago. This information is heard through the listening device of Lin Tang, whom Nayland Smith and company recognize. Nayland Smith and Dr. Petrie engage in a car chase after Lin Tang and Fu Manchu, but the duo escapes.