Li Mu, a doctor of modern mechanical engineering, caused his soul to travel back to the third year of Tang Zhenguan (AD 629) due to an explosion in his laboratory, and possessed the body of a poor scholar with the same name. The original owner died due to poverty. When Li Mu woke up, he was in a dilapidated rented house in Huaidefang in the west of Chang'an City. He was penniless, owed three months' rent, and was in danger of being evicted by his landlord.
