Time Out says
One of Hammer and Terence Fisher's most notorious and Sadean horror movies, about the thuggee atrocities in India in the 1820s. Guy Rolfe battles against a fatal sect of Kali worshippers whose mascot is a sexy teenager called Karim (Devereux). As men have their tongues pulled out or are castrated, Karim drools and wriggles so much that the film became a cult sensation on the continent and was cut in England. Actually, it isn't at all bad, even on a straight adventure level, and the Karim figure remains one of the purest incarnations of evil in all of Fisher's work. Be prepared for a few laughs, though, as rural Bucks is substituted for the sweltering plains of India.