Su Nian never thought that he would see Pei Ye backstage at the theater again. Seven years ago, he was the boy who accompanied her in the piano room. When they broke up, he said, "We are taking different paths." Seven years later, she became a performer in a small theater musical and he was the new stage manager. The first time they met again, he handed over the rehearsal schedule in a businesslike manner, looking like a stranger. Su Nian told herself that the past is the past. But the lost school badge in the props room, the hot cocoa in the thermos cup in the rehearsal hall late at night, and her figure standing outside the door all night when she had a high fever, all silently overturned her determination. It wasn't until the seven-year-late letter was uncovered that she realized that when he let her go, it wasn't because he didn't love her - it was because he loved her too much. The spotlight on the stage always only hits her, but she doesn't know that there is a person on the side stage where the lights cannot reach her, who has been guarding her for seven years.