Perfect Return

Since scientists discovered a new kind of light, countries around the world have invested their best scientists for more than twenty years to collect the light emitted from the earth in the past, which can reproduce what happened at any time and place on the earth in the past. This technology is intended to be used to understand the past and thereby better protect the earth, but it has been used by some people with ulterior motives... Ma Zhiyuan's parents are doctors. They were assigned to provide medical support in their early years but there was no news. They were told by the hospital that both of them had died. Ma Zhiyuan believed that something was strange and wanted to use the power of his old classmate Xia Jingping to pursue the truth and at the same time, let everyone who is dying have a "perfect return". Xia Jingping asked him to cooperate with a new experiment first...