Su Yangui woke up from a pool of blood and was trapped in the doorless secret room in Xiyuan. Rules on the wall: Don't lie. Breaking a promise will cause the consequences to flow backwards. After seven days, the Dream Eater will consume his consciousness. As a low-ranking clerk of the Tiandao Department, he can see the lines of cause and effect, but cannot lie - this is an absolute compulsion of the rules. The first time he recalled the memory of losing his left arm, the pain was seven times worse, like thousands of ants gnawing at the bone. The second time, he used the loophole that "concealing something or not reporting it is not lying" to deceive the cause and effect monitor on the stone gate. The third time, he used primary school mathematics to dismantle the prime number logic of the fairy formation and opened up a way out. But every time he looked back, he was losing himself: fragments of other people began to appear in his memory, and the face in the mirror became increasingly unfamiliar. After the fifth retracement, he finally spelled out the truth: the so-called Immortal Dynasty was a pseudo-history tampered with by the alien creature "Dream Eater"; his ability to retrace time itself was part of the trap. Before the sixth retrace was started, another "Su Yangui" walked out of the shadows and smiled at him: "The seventh time, it's my turn."
