Seon Jinwoo’s life takes a sharp turn when someone he once helped vanishes—leaving him stuck with a mountain of debt that isn’t even his. Refusing to give in, Jinwoo stands his ground. But loan shark Seonghyeon has other ideas, pressuring him to seal an unusual deal: a contract that uses his very body as collateral. Which begs the question, how far are you willing to go to pay for someone else’s mistakes?