Pangu City, a crossroads of extraterrestrial and Earth civilizations, harbors numerous aliens. Disguised as Earth creatures, they live among us. Among them are alien immigrants, alien tourists, and many villains with ulterior motives. The group hunting these villains is the renowned "Interstellar Detective." The arrogant "Interstellar Detective" Xiao Bei, pursuing the interstellar bandit Lambda, arrives on Earth and receives help from an Earth girl named Xiao Yi. Disguised as an Earth boy, he causes many comical incidents, but together with Xiao Yi, they capture numerous evil aliens. They defeat powerful Thunder Lizards, the mad Bat Doctor, the stubborn Tree Shepherd… leaving no place for the alien fugitives hiding on Earth to hide. Relying on advanced alien equipment and boundless ingenuity, they discover clues about Lambda and ultimately thwart the alien organization's plan to absorb Earth's life force, bringing Lambda to justice.

(Source: Youku, translated)