If the story starts like this, they are all still young... The young man Wu Xie meets the mysterious girl and the young man Zhang Qiling one after another. Why can't the mysterious girl's sachet be revealed to others? What kind of mystery is hidden? Why do the people who open it die one by one? And the death of Master Zhang Qiling is also inseparable from the mysterious girl! Is what Wu Xie will uncover a lifelong nightmare, or a sad past that he can't even talk about?