For Chu Yuchen, Su Yiyan was once the sunshine in his life, but this sunshine hurt him severely. But he still waited for her silently for four years. Four years later, Su Yiyan came back. But there was already someone else beside her. When he decided to start over, the secrets of the past four years began to be revealed bit by bit... Who made Su Yiyan cruelly leave Chu Yuchen? And whose arrival will reveal all the secrets?