After losing his job, Ryu frantically looks for a way to save his sister. He decides to sell his own kidney to raise money for her transplant surgery. However, after discovering that he is not a suitable match, Ryu becomes desperate and turns to his girlfriend, Yeong-mi, for help.
Yeong-mi suggests kidnapping Park's daughter, Yu-sun, in order to demand a ransom for her safe return. Reluctantly, Ryu agrees to the plan, not knowing the consequences that lie ahead.
The kidnapping goes awry when Yu-sun accidentally dies in the process. This sets off a chain reaction of violence and revenge, as Park goes to extreme lengths to seek vengeance for his daughter's death.
As the situation escalates, Ryu and Yeong-mi find themselves caught in a dangerous game of cat and mouse with Park and his henchmen. Each decision they make only leads to more bloodshed and tragedy, forcing them to question their own moral boundaries.
In the end, Ryu must confront the devastating consequences of his actions and come to terms with the price of seeking revenge. The film explores themes of desperation, loss, and the destructive nature of violence in a gripping and intense narrative.