After being forced into early retirement due to a debilitating illness, former baseball player Ray Waller relocates with his wife and two children to a new home. Eager for a fresh start, Ray hopes the house’s backyard swimming pool will offer both a fun escape for his kids and a way to aid his physical therapy. However, they quickly discover that the house harbors a dark and sinister history. A hidden evil, tied to the property’s past, is awakened, unleashing a malevolent force that begins to tear the family apart. As the terror escalates, the Waller family finds themselves trapped in a nightmare from which there seems to be no escape, forced to confront a horrifying presence lurking in the shadows.