Meteorologist Shen Guanyun transformed into a small cloud recorder in the Forbidden City of the Ming Dynasty. He has a deduction system that can predict three days, but he doesn't know that every time he uses it, he is stealing the destiny of the country. In order to survive in the mechanical palace battle, he was forced to form an alliance with Su Wanqing, a time-traveling female official who restored cultural relics. He used modern science disguised as Taoism to transform the steam armillary sphere, and dealt with eunuchs, monks and gear fairies. When they reached the core of the dynasty, they discovered that this prosperous age where steam and immortal magic danced together was actually the reverberation of a space-time accident three hundred years ago. And his system is the only key to closing this false world - if you press it, history will return to its place and your love will disappear; if you don't press it, the gears will rotate forever and thousands of souls will be imprisoned.
