Avenging Angel (1985)

"It's 4 years later. She's graduating college. The cop who got her off the street has been murdered. ANGEL'S back... with a vengeance!"

Molly Stewart, now a law student at UCLA, is determined to leave her prostitute past behind. After learning that the detective who helped save her life has been murdered, she quickly finds herself pitted against an underworld of mob figures who might be more than she's bargained for...