Three medical students thought swearing brotherhood was just a bit, but after falling asleep, they unexpectedly transmigrated into the real Liu Bei, Guan Yu, and Zhang Fei. Guan Yu goes dozens of miles out of his way after beheading Hua Xiong, Zhang Fei insists on warming up before going into battle, and Liu Bei casually offers to sell his two younger brothers. Everything is outrageous, yet they remain completely unaware of it. The once-arrogant warlords are left baffled again and again, until they become wary of the trio, guard against them, and compete to recruit them. What was supposed to be a campaign against Dong Zhuo to restore the Han dynasty ultimately turns into a laid-back farming victory for the three brothers.