In the early 1990s, amid China’s economic reform, computer researchers Xiao Chuang and Pei Qinghua seize an opportunity in the growing tech industry. Under Tan Qizhang’s guidance, they evolve from selling foreign computers to leading independent innovation, rising as industry pioneers.

Framed as the notorious Night Devil on his wedding day, top detective Xiao Beiming is accused of murder and treason, forcing him to flee. Three years later, he returns to the capital, earning the trust of his apprentice sister, Zhong Xueman. With a team of fearless allies, he unravels a series of mysterious cases, to expose the real Night Devil and restore order to Da Qi.

仙修奇才苏易水（邓为 饰），在十八年前被师父沐清歌（向涵之 饰）改变天命，一向离经叛道的“女魔头”沐清歌也为此背负污名死去。十八年后，沐清歌化为薛冉冉，而已继任西山派掌门的苏易水将体弱濒死的冉冉收入门下，誓要护她一世周全，自此师徒身份对调互换，两人之间会发生哪些啼笑皆非的故事呢？