Tang Zhen pretends to be the superficial and vulgar ex-girlfriend of the male protagonist in the campus novel. She is accidentally bound to the system and needs to complete a love mission before she can return to the original world. The male protagonist is a highly intelligent academic master and a scientific research genius. As the mission deepens, the two of them unexpectedly become more and more excited. When the direction becomes more and more deviated, the system is upgraded and online, requiring Tang Zhen to break up within seven days, otherwise she will not be able to go home. After learning that Ren Yanjing gave up going abroad for her, Tang Zhen chose to break up and leave in order not to hinder Ren Yanjing and to complete the task. At the airport, when the mission was completed, he suddenly learned that the world was about to collapse...
