This extremely low-budget adventure was director Jesus Franco's second Fu Manchu film for British producer Harry Alan Towers. Christopher Lee returns as the Asian madman, who has developed a way to turn the oceans into ice as part of his plan to rule the world. Kidnapping famed Prof. Herakles (Gustavo Re), Fu forces the doctor to help him with his diabolical plan. When Herakles' health starts to fail, Fu kidnaps two more people (Guenther Stoll, Maria Perschy) for a transplant operation at his Istanbul headquarters. Fu's old rivals Dennis Nayland Smith (Richard Green) and Dr. Petrie (Howard Marion Crawford) come to Turkey to foil his evil experiments. Rosalba Neri, Jose Manuel Martin, and Werner Abrolat co-star in this poor fifth installment in the popular series. The film is so poorly conceived that -- although it was made in color -- the shipwreck caused by Fu is actually a black-and-white scene borrowed wholesale from A Night to Remember. For completists only, this disastrous entry also stars Herbert Fuchs and Tsai Chin, while Franco makes a cameo as a Turkish detective. Various versions run 92, 86, and 85 minutes.
by Robert Firsching synopsis