In a Nazi Whorehouse

Salon Kitty was a high-class brothel in Berlin during World War II. It was used by the Nazis to gather intelligence, with secrets pried from the clients by booze and sexy women. Major Mueller, former Luffwaffe pilot, recently transferred to the SS and promoted to Lieutenant Colonel, is sent to investigate rumors that more was going on at Salon Kitty than sex and information-gathering. He finds the rumors of secret rooms in the basement were beautiful women were kept as playthings for a kinky, sadistic, high-ranking officials are true.
He samples the "merchandise" of Berlin's most notorious brothel, of course, including the strict bondage, harsh punishments and kinky sex.