Yoona and Jungmin almost get married until at their marriage , Jungmin come and cancel their marriage. Yoona very sad and disappointed with him. Donghae , Yoona's bestfriend and also Jungmin's cousin meet with Jungmin to an explanation from him. Donghae shock when Jungmin told him that he have a brain cancer and can't survive for a long time. What will happen next ? Find out....