Donghae, a man of age twenty-five got into a car accident. He lost his memory of his life, his love, his everything. he lost his memory of Eunhyuk, his lover and best friend. Whatever Eunhyuk does, he won't accept him again. One day, Donghae meets a girl called Jessica. he gets to know her and he begins to get convinced that he loved her. What happens, when Eunhyuk does not stay quiet?