Swim coach Anne trains her niece Juli for a state championship, sparking clashes with Juli’s mother, Anne’s sister Miriam, who fears Anne’s strict methods stem from her own abrupt, mysterious career halt years ago. At their mother’s 65th birthday, old secrets surface, triggering Anne’s panic attacks - visions of a shadow beneath the pool. Haunted by past disorientation at a key race, Anne must confront her fears to uncover the truth.