Chen Shixu, the world's top physicist, spent his whole life studying the theory of space and time, but was destroyed when his theory was about to be completed. When he opened his eyes again, he went back to his 20th birthday - the night that changed his life had not yet happened, and his lover and family were still around him. This time he vowed to find out the mastermind and change everyone's fate. However, when he used his knowledge of the future to prevent the first "accident", the timeline began to correct itself: he prevented a car accident, and another more tragic accident occurred elsewhere; he saved a person who should have died, and another innocent person died mysteriously. What's even weirder is that he discovers that he is not the only reborn person, there are "liquidators" in the dark hunting down all those who try to change history. And the mysterious organization "Ouroboros" that ruined his life seemed to have known for a long time that he would come back, leaving a "welcome ceremony" specially prepared for him at every key node.
