The story takes place in the future in 2045. Humanity's development of technological power has reached an immeasurable level. In order to explore more possibilities, humans have developed super-powerful technological weapons called city engines through technology. Scientist Ai Lei believes that something beyond our control will bring unprecedented destruction to the human world. As expected, those scientists used the city projector many times to condense the technological power in the city projector into a gate of time and space. In order to retaliate against those "crazy" scientists, there are countless malicious robots inside the gate of time and space that retaliate against humans.
In order to fight against these events, Ai Lei's son Ai Ying created a heart bracelet, which he alone could not stop. For this reason, he began to gather friends and everyone around him who knew about these events and formed an expedition team named Xu Ling to begin to fight against the unprecedented crisis. After the incident subsided, the gate of time and space was still not closed. Ai Ying used technological power to try his best to open the gate of time and space once a year. The incident was originally trivial because the daughter of the owner of Penglai Island, the God of War, accidentally broke into the human world. The evil power in the city kept spreading to the outside world, and spread to demons, devils, ghosts, monsters, and gods. They were transported to different places by the gate of time and space. The human world ushered in a greater crisis. The power of the Cixin bracelet is getting worse day by day. Ai Ying understands that only by finding the next successor can the Cixin bracelet regain its power. In order to find the new savior, the surviving members of the Xu Ling expedition team: Li Ni, Chen Siyu, and Ai Yingbing divided into three groups to search.
