Flowers on the Razorwire (2004)

True crime author Doug Shanks thought he'd seen it all until the day he dialed up a two legged nightmare, the psychotic dominatrix Flower. She ties him up and tortures him mercilessly until it's time to tell her a story. Doug stutters out a tale of a young Asian girl trapped in a broken down elevator with a boiler repairman who might just be Los Angeles' worst serial killer ever!