Abyss.

Nathan Grant, a retired cardiac surgeon, leads a solitary existence, haunted by inner demons he cannot escape. His days are spent in a relentless pursuit, but not of healing; rather, Nathan's past drives him to continue his line of work creating terror upon the unsuspecting residents of Oldham through a series of grisly murders. As Nathan's dark deeds threaten to unravel, a discovery by one of his victims sparks a chain of events that sends shockwaves through the town. With fear gripping the town, Nathan's hunt for his next victim intensifies, driven by a sadistic addiction that knows no bounds. Amber, a resident of Oldham, crosses paths with Nathan, unknowingly thrusting herself into the heart of his twisted world.