Angel 4: Undercover

Molly is now a police photographer in a relationship with a DJ. Her old friend from the streets gets in touch with her. She's in town with a band and hot for the lead singer. Her friend gets murdered and Molly turns up at the scene to photograph the body. So, Molly again assumes the identity of Angel and hits the club scene to search for the killer - this time as a groupie rather than a prostitute. (imdb)