Kyung Hoon is the youngest in the family. He must survive in the streets with his older brother Heechul having a mental illness. He's the only one who can earn money for this family. For that, he works in the streets, joining the gangs and making enemies. For every action, there is an equal and opposite reaction. Kyung Hoon must face Heechul's innocent death in result of his type of work. Will he be able to accept the fact that Heechul's tragic death was in his bloody hands?