Shi Xiaoman, a female college student who is a fan of modern suspense dramas. While watching suspense dramas all night long, she accidentally traveled to Peking in 1925 due to an electric shock and directly became Xiao Zhiyun, the eldest daughter of the Xiao family who was getting married to Peking Police Detective Chen Xu. Chen Xu adheres to new ideas and is extremely resistant to this feudal arranged marriage. He just wants to divorce as soon as possible. Shi Xiaoman relied on the reasoning ideas learned from suspense dramas and his own funny attributes to gradually break Chen Xu's prejudice in the process of solving the serial mysteries in Peking. The two changed from "contracted couple" to tacit partners and lovers, and finally worked together to uncover the truth of the case and the secret of time travel.
