The alien civilization, which claims to be the most advanced in the Milky Way, tried to establish diplomatic relations with the Earth, but a series of misunderstandings led to an accident. The alien messenger's spacecraft fell into the atmosphere and eventually crashed in a world park in a certain city in China. Geng Hao (played by Huang Bo), who makes a living by performing monkey shows, and his friend Da Fei (played by Shen Teng), a wine dealer, mistook the injured alien for a monkey from South America. With his own monkey injured, Geng Hao began to train this "Congo Sao Sao Monkey" in his mouth. Because of the loss of the superpower bonus equipment, the alien's skills could not be exerted, and he could only let the two silly earthlings beat and scold him. Despite this, he still tried to take back his equipment. On the other hand, the superpower that had failed to communicate with the aliens before shuttled around the world to find the alien messenger based on the information left by the aliens. The fate of the earth is developing in an unpredictable direction... The idea of this film comes from Liu Cixin's science fiction novel "Rural Teacher".