Kang Si-U is sent to prison due to a certain incident in the past. After being released from prison, he joins hands with Do Ji-Hyeok in order to take revenge on Kang Ha-Jun who ruined his life. Kang Si-U has only one purpose: to make Kang Ha-Jun feel the same as he did. But the more he hates him, the more Kang Si-U gets caught up in the past when he use to like Kang Ha-Jun and starts to gets caught up in a sense of self-doubt and guilt every day. It's getting more and more catastrophic...! He started revenge to save his life, which had been ruined by the betrayal of his wicked ex-lover. Will he be able to succeed in his revenge, leaving behind the truth he faced and his feelings? (Source: Ridibooks, translated)