The Last Amnesiac

Is it true that a kind of people called Doviks really invaded the earth? As the back-up man of Ling Yin Yang, I actually have to take on the plan to save the earth? The timeline has been modified, and the Dovik invasion will still come, but the corresponding time will be postponed. Qin Shihuang and Ying Zheng are actually two people? And they're not dead yet? Amnesia plan, start...