A baby left in a subway coin locker is taken in by a cold and strategic loan shark and crime leader known as “Mother” (Kim Hye-soo), who operates an organ-trafficking operation in Incheon’s Chinatown. The child, named Il-Young (Kim Go-Eun), is raised to become Mother’s devoted enforcer and is being prepared to take over the business. However, when Il-Young begins to question her allegiance to Mother, their conflict erupts into a brutal and bloody confrontation.