Seven days before the National College Entrance Examination, Chen Yan, a top student at Linzhou No. 1 High School, encounters a destitute beggar outside the school gate. The man claims to be Chen Yan himself, twenty years in the future. He even reveals a childhood secret known only to Chen Yan and his childhood friend, Zhou Bei, and predicts that Chen Yan will be caught cheating during the comprehensive science exam. When an admission ticket stained with coffee appears, Chen Yan discovers that the tragedy awaiting him in the future seems closely connected to his friend's betrayal, the schemes of a wealthy businessman and his son, and a plot unfolding in the examination hall. Faced with friendship, his future prospects, and a series of troubling mysteries, he begins to reconsider everyone around him. This time, can he see through the conspiracy, protect his exam results, and rewrite a future that seemed destined to happen?