Ray Waller is a former major league baseball player forced into early retirement by a degenerative illness. He moves into a new home with his concerned wife Eve and their two children. Secretly hoping, against the odds, to return to pro ball, Ray persuades Eve that the new home’s shimmering backyard swimming pool will be fun for the kids and provide physical therapy for him. But a dark secret in the home’s past will unleash a malevolent force that will drag the family under, into the depths of inescapable terror.