When Lin Shen, a delivery boy, was delivering orders on a rainy night, his electric car was struck by lightning and activated the "Tang Tang Food Delivery System", and he was involved in Chang'an City during the Tianbao period. The system requires him to complete the takeout orders of key figures in history, otherwise he will be swallowed by the turbulence of time and space. While completing Yang Guifei's lychee order, he was accidentally involved in the power struggle between Li Linfu and An Lushan, and at the same time discovered that his electric car had the ability to travel through time and space. By completing orders, he gradually mastered modern medical skills, gunpowder formulas and other skills, trying to change the historical trend of the Anshi Rebellion. Dealing with conspiracies and love with four women with very different personalities, they finally discover that there is a bigger secret hidden behind the system - she is actually a candidate for the Bureau of Historical Correction.
Who can understand?