Kang Eun Su never craved luxury—she only dreamed of a simple, happy life with her husband, Park Do Jin, and their young daughter. But when Do Jin receives a devastating cancer diagnosis, Eun Su’s world collapses. Struggling to pay medical bills while working as a part-time supermarket cashier in Seoul, she faces an impossible choice.
Her life takes a shocking, dark twist after she accidentally discovers millions of dollars’ worth of illegal drugs. Instead of alerting the police, Eun Su seizes the chance to secure her family’s future and secretly begins selling the stash.
She teams up with Lee Gyeong, her daughter’s after-school art teacher, who secretly operates as a Gangnam club-scene drug dealer. Together, they build a dangerous new life in the shadows. But success comes at a cost: Jang Tae Gu, the relentless head of the narcotics division, is closing in. With the law on one side and ruthless criminals on the other, Eun Su must choose between survival, morality, and the family she’s fighting to protect.