Black Shampoo is a film about a hairdresser, however as it is a blaxploitation film the hairdresser spends most of his time sleeping with his female clients and ends up fighting the mob.
It stars John Daniels as the hairdresser/stud who ends up getting into trouble when he falls for his new receptionist Tanya Boyd. She has walked out on a gangster who naturally doesn't take no for answer.
So that is the story, the reality is the film is just a massive slab of sleazy cheese. Sex and gratuitious nudity punctuated by violence and ridiculous stereotypes a plenty. It isn't a film to bore though as everything proceeds at a high rate of knots. It is total nonsense of course but made very bearable by the sheer cool and a nice 70s soul/pop soundtrack.