In an embarrassing 'alien encounter', Jiang Xiaozhou was involved in the incident of alien eggs 'stranded on the earth'. On one side is Dandan who came to the earth for 'tourism' but got lost, and on the other is the Earth Security Bureau who is severely allergic and a team of suspicious scientists. By a strange combination of circumstances, Jiang Xiaozhou became the "translator of the two worlds" from start to finish, and Dandan's friend Athos also quietly arrived. During the three-party struggle, the truth came out: the so-called 'alien invasion plan' was actually Dandan's 'homework'. However, when a real external threat arrives, aliens and humans have to join forces for the first time to launch a battle to defend the earth that is full of mistakes and jokes. The ending is sublimated with humor: no matter how big the differences are, they can be resolved through communication and goodwill. The alien aliens and the people on earth embark on a joyful adventure.
