After being accused of cheating in the college entrance examination by the entire Internet, Jiang Yan coldly returned to the examination room ten years ago, and time flowed backwards by turning the pages of the test paper. He had to retake the exam and rewrite his destiny within seven days, but his former deskmate Lin Zhao, crazy class teacher Zhou Yansheng, and Su Tang who manipulated public opinion all appeared in this reenactment that was destined to collapse. When the truth is buried in the answer to every question, he no longer seeks innocence, he just wants everyone - including those silent victims - to hear the echo.
