Atsuko and Yuri were classmates from elementary school through college, but they hardly ever spoke to each other during all those years. Their personalities, interests, and social circles were completely opposite. Fifteen years after graduation, they meet again at a class reunion. There, Atsuko learns Yuri's secret: she has been suffering domestic violence from her wealthy husband. Without hesitation, Atsuko leaves the reunion, finds Yuri's husband, and kills him.

Later that night, the two women sit in a late-night family restaurant. Yuri confronts Atsuko, asking why she killed her husband. Instead of reporting the crime, Yuri decides to join Atsuko in fleeing the country. The two opposites, bound by a murder they will share forever, begin a desperate escape. Their destination is Vietnam, where Atsuko has a friend named Phu Thuy. In Vietnam, Phu Thuy reveals unsettling details about Atsuko's motivations for choosing this particular route and proposes a risky plan to help them stay hidden.

The story unfolds as a tense drama and suspense thriller, following the two fugitives as they navigate guilt, trust, and the growing, uneasy bond between them. Their flight forces them to confront their pasts, their secrets, and the possibility that their destination may be ruin rather than freedom.