Parasomnia

Parasomnia is a 2008 American horror film about a man (Dylan Purcell) who rescues a woman (Cherilyn Wilson) from a hospital, unaware that she is being tormented by a powerful hypnotist. The film costars Jeffrey Combs and Patrick Kilpatrick.

Plot Summary
Hypnotist Byron Volpe (Kilpatrick) is being held in a hospital after being convicted of hypnotizing his wife (Sean Young) into killing herself. The room next to his holds a young woman named Laura (Wilson), who suffers from parasomnia. Abused by staff and otherwise mostly forgotten, Laura is due to be moved to another hospital for experimentation. She is discovered and rescued by Danny (Purcell), who takes her back to his apartment. Danny tried to kindle a relationship with Laura during the brief times when she is awake.

What Danny doesn't know is that Volpe is able to enter Laura's mind while she sleeps. While he chases her around the dreamscape in her mind, he is also able to control her sleeping body, and uses her to murder one of Danny's neighbors- as well as a detective sent to investigate the crime.

Danny decides to kill Volpe to free Laura from his control, but when he goes to the hospital, Volpe get free and kidnaps Laura, while Danny is captured by Detective Garrett, who is also under Volpe's control. At Volpe's lair, the mesmerist orders Garrett to play Russian roulette while he forces Danny to denounce his love for Laura. Garrett "loses" the game, and the sound of the gunshot is enough to free Danny from his trance. He defeats Volpe and saves Laura, only to be shot by a dying Garrett.

At the hospital, a comatose Danny and the sleeping Laura lay side-by-side. They continue their romance inside Laura's new, peaceful dreamscape.