Shen Yan is transformed into the villain of an ancient sadistic novel. In order to reverse the death ending, he is forced to bully the original male protagonist Xiao Chen, but unexpectedly contributes to his darkening. The female protagonist Lin Qingyao gains the ability to read minds and sees through Shen Yan's nature as a coward and the truth of the "world in the book", from disgust to temptation. The two formed an alliance to fight against Wang's family's poisonous plot and Xiao Chen's murderous plan, and repeatedly saved danger. During the killing in the hunting ground, Shen Yan was on the verge of death from Xiao Chen's cold arrow in order to save Lin Qingyao. Lin Qingyao burst into tears and revealed the secret of the "original book ending", which aroused suspicion in the Shen family. Xiao Chen's belief in the dark collapsed and he was determined to thoroughly investigate the truth of the "world in the book". At this moment, Shen Yan's life hangs on a thread, surrounded by three crises - uncertainty about life and death, identity leakage, and the darkened male protagonist's obsession with revenge.