After marriage, Misa (Mako Oda), who continues to work as a section manager at a major trading company, leads a busy daily life. One evening, while returning home from work, she walks through a park talking on the phone when she hears strange noises coming from deeper within. Growing suspicious, Misa quietly peers around the corner—only to discover her brother-in-law's wife, Mana (Mizuhara Sana), meeting with an unknown man. A shocking turn of events awaits.