The heroine Lin Zhaoye was originally a review editor on a modern urban romance novel platform. After an overtime accident, she was involved in a quick-travel system called the "Ending Fixer". She had to travel into three modern romance novels that had suffered serious breakdowns to correct the tampered plot trends. In each small world, she dresses as a "villain", "ex", "cannon fodder sister" and other characters who are destined to be scolded. She needs to maintain the superficial character of the original book while secretly dismantling the source of the collapse, so she presents an obvious two-sided state. The system requires her to help each world reach a happy ending, but she does not bind any love lines, insists on a no-CP stance, and treats all emotional relationships as variables and human observations in the task. As the mission progresses, she discovers that the so-called "collapse" was not an accident, but someone took advantage of a loophole in the book to use the modern romance world as an emotional testing ground. After completing the three world missions, she must return to the Master Control Bookstore and rewrite the final ending with her own hands.