In the fifth year after the apocalypse, former botany graduate student Chen Dagui accidentally activated the "Crop Growth Log System". Using the mutant crop cultivation guide, soil improvement plan and resource conversion formula provided by the system, he started from an abandoned greenhouse and gradually established a self-sufficient "green crop base". In the process, he not only had to deal with the invasion of mutant plants and the plunder of other survivor forces, but also had to decipher the source of the apocalyptic virus under the system prompts. When the base was upgraded from a village to a city-state, Chen Dagui finally discovered that this disaster was actually a test set by the ancient farming civilization to screen "new cultivators".