In the gritty world of Seoul's underground crime scene, a mysterious young girl is abandoned in a coin locker as a baby and raised by a ruthless loan shark known as "Mom." As she grows up, the girl, now known as Il-young, becomes Mom's most trusted enforcer, carrying out brutal tasks without hesitation. But when a job goes wrong, Il-young's loyalty is tested, leading her to question her identity and the dark world she's been raised in. As she navigates through betrayal and self-discovery, Il-young must confront her past and decide where her true loyalties lie. "Coin Locker Girl" is a gripping tale of survival, loyalty, and redemption, set against the backdrop of a seedy underworld where trust is a luxury and betrayal is a constant threat. With stunning performances and a gripping storyline, this Korean crime drama will keep you on the edge of your seat until the very end.