British India, 1895. The Burpas are revolting but then again 'The Devils In Skirts' who guard the Khyber Pass are not too inviting either! Can Sir Sidney Ruff-Diamond (Sid James) prevent the scheming Khasi of Kalabar (Kenneth Williams) from starting a full blown rebellion, ending British rule and making his cushy job obsolete? Can he rely on the help of the wayward Brother Belcher (Peter Butterworth), and prevent the secret concerning the 3rd Foot and Mouth Regiment from becoming common knowledge among the natives? All will be revealed in this masterly tale of passion, greed and missing underpants set in the raging days of the Raj.