Yoon Byeol's world is turned upside down when his brother, Hyesung, gets into an accident. But when Byeol visits him in the hospital, he's surprised to find him in an expensive private room and learns that Hyesung received compensation for the incident. When he goes to confront Sung Woon, the person who pushed his brother down the stairs, Byeol is met with another surprise: Woon knows about a dark side of Hyesung that is hard to believe. What is their relationship, and why would Woon push him?