Heart of Midnight (1988)

"Forbidden secrets live in a club called Midnight."

A young woman who is getting back on her feet after a mental breakdown, Carol Rivers discovers that her late uncle has left her a rundown nightclub. Carol decides to renovate the venue, but, in the process, uncovers dark secrets about the club and her dead relative. After a series of disturbing events, Carol becomes increasingly unstable, but she finds some measure of comfort in Sharpe, an enigmatic older detective.