Nightmare Detective (2007)

Detective Keiko Kirishima is plunged into a chilling case when a series of victims inexplicably take their own lives by self-inflicted wounds while asleep. As she delves deeper into the investigation, she discovers a sinister link between the deceased, suggesting they are trapped in a nightmarish realm. Unraveling the mystery requires her to confront the dark forces at play, while grappling with her own fears. As the line between dreams and reality blurs, Keiko races against time to uncover the truth before more lives are lost.