In the early morning of a spring, an alien spacecraft passed over the earth, and the world order instantly collapsed. Biologist Han Jiwen was involved in the global crisis, and together with United Nations official Lin Yousu and eccentric scientist Singer Wall, they took on the task of "communication, rescue or elimination". At the same time, a team of alien hunters and illegal technology groups are secretly operating, and the world is advancing on multiple fronts: internal divisions among humans, internal struggles among aliens, and the confrontation between technology and survival. Under humorous conflicts, the boundaries between humans and aliens are gradually broken down, and the truth emerges: Who is the alien and who is human? At the end, Han Jiwen and Chloe Sellis crossed the "wall of species" and discovered the common meaning of survival and growth.
