Bae and Choi in the drama photoshootThe story begins when Jun-sang, the son of an eminent musician, moves to Chuncheon, a rural city in South Korea. As an extraordinarily talented student, Jun-sang is welcomed by his fellow students as well as teachers, but remains a quiet, introverted young man. As a result of his mistaken belief that his father is dead and serious conflicts with his mother, Junsang believes that no one truly loves him.

On one fortuitous day on the ride to school, Jun-sang's classmate Yu-jin interrupts him on the bus. Jun-sang soon falls in love with Yu-jin, who opens herself to him with an innocent heart. Their love, however, is cut short after Jun-sang is involved in a serious auto-accident and, due to brain damage, is unable to recall his past life.

Jun-sang's mother, who loves Jun-sang but was misunderstood by him, does not want to retrieve her son's sad past memories. Instead, she decides to move to the United States with Jun-sang, where he can start a new life under the identity of Yi Min-hyung. As such, both his friends and teachers are told that Junsang is dead.

Ten years later, Jun-sang is an award-winning architect in the United States. He does not remember anything about his life in Korea. He is completely different, an open-minded person who cares about other people, including his mother. The story reaches its climax when Yu-jin, as an able architect, meets Min-hyung and tries to find out if he was her lost lover Jun-sang.