Having arrived at a remote corner of the Essex marshes to investigate the murder of Detective Sergeant Hyte, Smith has split his forces in his search for Dr. Fu Manchu's hidden television center. Dr. Petrie  and Kerrigan are making their way along the river when they stumble upon an old hut. Inside they find a Mandarin's cap and Kerrigan certain that Fu Manchu will try to retrieve it sends Petrie to summons Smith while he waits in the hut. Suddenly Adata enters and as she is about to leave with the cap Kerrigan stops her. As he forcibly compels her to come with him the sound of drums are heard. The drums of Fu Manchu...