Lee Jieun, now known as IU, was the girlfriend of Lee Joon. Lee Joon was a man who loved girls just because they were rich and pretty. One day, Lee Joon suggested that the two ran away to America. IU agreed, but her father didn't. Somehow she escaped with Lee Joon with all her father's money. When they arrived at the airport, IU rode the plane without Lee Joon, who was hanging onto the suitcase full of money. When she met Thunder, her only friend, she realized that Lee Joon had betrayed IU.