Nice Guy

Kang Ma Roo (Song Joong-ki) receives a desperate late-night call for help from his best friend Han Jae-hee (Park Si-yeon).  When he arrives at the hotel, he ends up throwing away his future prospects to be a doctor and takes the fall for her and ends up in prison.

Upon his release, he discovers the truth behind the incident and decides to exact his revenge.  A chance encounter leads him to meet Seo Eun-gi (Moon Chae-won) whose mother has been forced out of the house following Jae-hee’s marriage to her father.  They decide to work together to bring her down.