One year into her marriage, Sayaka lives happily with her husband—until the day her life takes a dark turn. Her neighbor, Unno, moves in next door, reigniting a forbidden past. Unno was her boss at the company where she worked before marriage, and the two once engaged in a secret affair. Using compromising, seductive photos taken during that time, he blackmails Sayaka into submitting to his desires. Desperate to protect her marriage, she reluctantly gives in. But this concession marks the beginning of a nightmare that will shatter her peaceful life forever.