Khim and Rain are brothers from the Kannakool property family. Rain is a friendly fourth-year student and very different from his younger brother, Khim, a third-year student who is quiet and introverted. The two brothers have a friend and bodyguard called Phayu, the son of the Kannakool family’s butler. Khim’s world is turned upside down after he meets Sun, who has just transferred to the university. Sun is an optimistic young woman who loves playing the guitar but was born with a heart condition. A close bond develops between Khim and Sun in the classical music club, but misunderstandings, rivalries and family problems lie ahead for them. What fate awaits them?