Wang Cong accidentally found himself trapped in a death rewind loop, returning to 7 a. M. On December 3 every time he died. 48 Hours later, the alien fleet arrives, and the world-destroying white light will swallow everything. After experiencing more than twenty tragic deaths, Wang Cong went from escaping to facing the end. With the help of scientist Zhao Gang, he discovered that He Weizhong, the administrator of Bureau 749, was actually a traitor who betrayed all mankind and collected the brains of scientists for alien forces. With only two days left before the end, Wang Cong must find the truth between madness and sanity to save the world that is destined to be destroyed.