One married woman begins a journey not for love or romance, but in search of herself. For the first time, she lies to her husband and arrives at the filming location—Nakasaki Yukine, age 30. "I was proposed to right here on this beach, and got married," she recalls. Illuminated by the setting sun on the shore filled with memories of her husband, her face reveals complex emotions. A story of her first affair unfolds like the vast blue sea. Torn between guilt toward her husband and overwhelming desire, she is gradually consumed by the waves of infidelity. This two-day, one-night documentary-style debut captures a shocking 190-minute narrative.