Lottie Mason is losing control… and she likes it. Mason, an undercover cop in Los Angeles, spends her nights posing as sex workers and drug addicts, but during the day, she is forced to attend psychotherapy sessions whilst being investigated for a fatal shooting. One night, fate leads her to the home of mob boss Tony Perón, and from there on, Mason becomes entangled in a deadly dilemma. Theresa Russell is… seduced by a fantasy… trapped in a mystery… and led by a dangerous Impulse.