A child abandoned in a subway coin locker is sold to a ruthless and calculating loan shark and gangster boss dubbed Mother, who runs an organ-harvesting ring in Incheon’s Chinatown. Named Il-Young, the baby girl grows into Mother’s loyal right-hand enforcer and is groomed to be her eventual successor. But when Il-Young’s loyalty to Mother wavers, the clash between the two unleashes a merciless tidal wave of blood-soaked retribution and strife.