Mo Xiaofeng died unexpectedly in an adventure. At the funeral of Mo Xiaofeng who had been in love for 10 years, Yang Yixue got his legacy, a mysterious wooden box full of letters. With these loving letterheads, Yang Yixue's thoughts were flying and dusty memories were opened. She regretted that she had missed her lover. The "Mystery Wooden Box" has a magical traversal function, which can be connected with the past time and space. Yang Yixue wants to recover the lost love by continuing to communicate with her 19-year-old geese..