A car accident caused Bai Yuxin to accidentally travel into the world of a bloody ABO novel called "Set the Night: Where the Lovely Wife of Mr. Lu Runs". Not only was she reborn as Alpha, an 18th-line junkie with the same name and surname, who drank to death, she was also bound to a chatty system called "Eggplant". Her mission was to save the tragic cannon fodder female supporting character in the book, Jing Yuxun, and increase her happiness value to 95%.
She approached her in the name of a "friend", gave her a red rope, accompanied her to exhibitions, celebrated her birthday, and even cleverly intervened at key points in the plot to try to reverse Jing Yuzhen's fate of going dark. However, she gradually discovers that this world does not completely follow the original work - Jing Yuzhen seems to have awakened long ago, and there is a deeper secret hidden behind the system's so-called "happiness index".