Secrets of a Vice Cop's Wife (1969)

The story of a high class prostitution ring disguised as a beauty parlor with domicile service. The police is on the trail of the network fast spreading across Europe but they need a witness to testify in court. Only the leader keeps getting to the girls right under the police protective custody. To make matters worst, one of the prostitutes is the wife of a policeman, and the new girlfriend of the leader.