Jia Heng and Lao PI, both professors of Qingdu University, are a couple. Under the laws of nature, life comes to an end. Yu Luo wakes up in a parallel world and becomes a four-year-old genius. In the parallel world, the age difference between Jiaheng and Laopi is huge, and Laopi married Jiaheng's best friend Zhichen, and Zhichen and Laopi adopted Jiaheng, who is still a young child... Laopi's great secret has been revealed bit by bit. In the face of love and family, survival and destruction, Jiaheng is difficult to make a choice.