Back in his high school days, Joon Suk was bullied by Chang Shik. Because of this, Joon Suk's high school days were like a nightmare. Now, Joon Suk finds it difficult to live a normal life due to the bullying. Meanwhile, Chang Shik, who has forgotten what he did to Jeon Suk, lives a relatively happy life. He is about to marry Ji Hee. Joon Suk will pay him back for all the misery.