Kei, a top student and member of the swim team, is participating in a rigorous training camp to prepare for the national championships. She dedicates herself wholeheartedly to daily training, striving toward her goal. However, her relentless efforts have sparked jealousy among her female teammates, who begin giving her malicious, hostile stares. One day, Kei suffers sexual harassment from one of the coaches. Deeply traumatized by the incident, she confides in Coach Katagiri, the one person she trusts most. But this conversation takes an unexpected turn, dragging her into a tragedy beyond her worst nightmares.