Song Ci is invited to the Southern Song capital - Lin'an - to investigate the murder allegedly committed by the Goddess of the Night.

As the assistant of superstar Wanren, Lin Yang has always dreamed of becoming an actor. When he finally gets his hard earned opportunity, he becomes replaced by others at the last minute. Lin Yang saves Wan Ren at the set, but by doing so he hurts his face. Wan Ren fires Lin Yang, and only after he meets Wan Jun, a sweet girl, and gets plastic surgery it seems his dreams can be attained.

Su Jinfeng, a local citizen, contracted a deserted island in the sea from his village. He has been planting coconut trees and picking coconut fruits on the island for several years. On this day, Su Jinfeng suddenly encountered a dinosaur while working in the coconut grove. He was frightened and fled for his life. Afterwards, Su Jinfeng was puzzled and brooding about the encounter with dinosaurs, and immediately informed a media of the information, hoping to attract attention and solve the mystery of dinosaurs. Media editor Lin Peilun was overjoyed when she heard the news. As a media person, she knew that if the situation was true, the prehistoric civilization of dinosaurs would be an unprecedented major discovery for the contemporary age. She may even be the first to report the incident..

"4 Idiots" tells the story of several rural people who went to live in the city and then struggled. Everyone has a history of blood and tears, but it is also an inspirational history. Going to Beijing for fame and fortune, encounter all kinds of strange and unreliable journeys along the way, and finally find the true meaning of life.