During a drag queen show staged at the notorious Roman Blue Gay club, Nadia, one of the guests who knows too much of things (s)he shouldn't, gets viciously killed. Enter inspector Nico Giraldi (Tomas Milian) who's having a really hard time with his nagging wife. He tells her that he's been sent on duty to New York but stays in Rome in order to work on the Nadia case. Clue after clue, Giraldi founds out what's going on behind the curtains of the very gay Blue Gay affaire... The 11th and last film in the series directed by Bruno Corbucci made Milian a star of the Italian b-movie.