In January 2020, the COVID-19 broke out, and life on the earth began to stagnate. Human clocks began to be disordered. Human joys and sorrows were not connected, and even the perception of time was completely different... The two heroes in the story had been in love for many years. Girls were studying in Britain, while boys were in China. During the epidemic, the two of them maintained a habit of remote communication, but found that their perception of time was vastly different - a girl quarantined at home in the UK felt the stagnation of time; And the boy, due to being in the center of the epidemic, felt a sense of crisis due to the unclear virus. He felt time break through, surging forward at full speed. The two of them began reading "The Order of Time", hoping to find some comfort in Einstein's theory of time relativity