In an accident, Cynthia inadvertently enters the world of her own creation, rekindling her passion for writing and her desire for love. Originally, she lived a sweet life with Adair, the hero of the book, but when Gu Chen discovers Cynthia's secret of wearing the book, he starts to prevent her from returning to the real world. In the end, the system revokes Lucas's role from the main character, changing it to a supporting character, and wipes out Yue Xin's memory. By mistake, Cynthia and Adonis, the new hero of the book, become husband and wife and start a love story full of conflicts and struggles. In this relationship, there is a third party, Fiona, who is the white moonlight in Adonis's heart. As the story develops, Lucas finds Cynthia by chance and rescues her from the Man in Black. The plot gradually returns to the right track. With Lucas's help, Cynthia realizes that she is in the world of the book and tries to recover her memories of reality. Her original dream was to become a famous online novelist, but due to the frustration of her work, she inadvertently came to this fictional world. In order to return to reality, she must complete her mission here. In the end, as her memory gradually recovers, Cynthia decides to stay in this world voluntarily and give up all her memories of reality in order to pursue her love for Lucas. The mysterious letter also becomes blank, leaving unanswered questions and uncertainty about her future.