In 2020, the "Williams Building" suddenly collapsed, causing numerous casualties. One of the best-selling novels based on this story is a big hit! This is because the book is a mixture of reality and fantasy, which makes readers talk about it with relish. The protagonist of the book, Shi Guang (played by Tan Junyan), was an engineer who inspected the building. Because he felt that there was something fishy about the collapse of the building, he insisted on investigating, which led to the deaths of his lover Zhang Min (played by Deng Peiyi) and his sister Ouyang Jiachun (played by Jiang Jiamin), and finally Shi Guang was also killed. Shi Guang woke up and went back to the time before the building collapse, when he and his sister had not yet recognized each other, and Zhang Min was still alive. God gave Shi Guang a chance to be reborn, and Shi Guang decided to prevent all disasters from happening. Shi Guang believed that his master Qi Yaohua (played by Zheng Zicheng) colluded with the developer Kang Yongren (played by Lin Weichen) to betray him. In addition to being determined to prevent the collapse of the "Williams Building", in order to avoid implicate Zhang Min and Jiachun as in the original time and space, he decided not to acknowledge his sister first, nor to develop a romantic relationship with Zhang Min, but only to protect the two in secret...