As Kim Taeyeon and her brother, Kim Jonghyun, start high school at Hannajesang Arts (madeup), they get terrible grades but go on with hope. Their parents die after meeting with a fatal accident, causing them distress. Jonghyun, being older, takes good care of his sister so they always stay together. Jonghyun has 4 friends, Lee Taemin, Choi Minho, Kim Kibum and Lee Jinki. Jessica Jung, a foreign exchange student, comes and gets along well w