Having closed himself away from the world, former boxer Chul Min starts a new job as a parking lot attendant. One night, a visually impaired young woman, Jung Hwa, walks into his tollbooth to watch television with him. Jung Hwa's bright spirit and smile in the face of adversity reach through to Chul Min's heart and shine a ray of hope into both their lives, but their love and happiness may be short-lived.
Kaori lost her eyesight and family in an accident. While trying to enjoy the small things in her life, Kaori struggles to live happily. Kaori mistakes Rui for someone else and begins to talk to him. Rui was once a promising kickboxer, but something happened in his past to cause him to disassociate himself from everyone. Kaori's smile brings out a change in Rui. The two people begin to have feelings for each other, but Rui learns about Kaori's past accident and his connection. Rui decides to take part in an underground fight to pay for Kaori's eye surgery.
Lee Gun used to be a promising tennis player, but he was injured. After that, he lost all of his self-esteem, and his life completely changed. With the use of a memory eraser, his memory is erased, and he is reborn with maximum self-esteem and presence. His first manipulated love is Kyung Ju Yeon, a psychiatrist at the brain research center. Other people around him include his younger brother Lee Sin, who is ranked the world’s no.1 ranked tennis player. Meanwhile, Jeon Sae Yan is Lee Sin’s translator.
Ko is a hard working doctor who has little time to spend with his wife. When she dies in a car accident her heart is given to another woman, Tse Yuen Sam. Ko later changes careers and becomes a paramedic. One night while on call in an ambulance, Ko attends a traffic accident involving Sam. He discovers she is the recipient of his wife's heart and that her husband Derek has left her. Ko decides to use their resemblance as a means of making amends for both his and Derek's treatment of their wives.
