Ray Waller (Wyatt Russell), a former major league baseball player forced into early retirement by a degenerative illness, moves into a new home with his concerned wife Eve (Kerry Condon), teenage daughter Izzy (Amélie Hoeferle) and young son Elliot (Gavin Warren). 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.

Based on the acclaimed 2014 short film by Rod Blackhurst and Bryce McGuire.