Karlu Star scout Xing Nai descends to Earth with the goal of occupying the convenience store's snack section, but accidentally breaks into the home of corporate slave Lu Ye. Lacking any human common sense, the alien girl uses her superpowers to cause numerous absurd farces, learning Earth rules while gradually developing mutual affection with Lu Ye. Superior Zeta comes to inspect and is successfully "turned" by hot pot and milk tea. When the Karlu fleet determines to attack Earth by force, Xing Nai faces a difficult choice between her home planet and her lover. In the end, she cleverly uses Earth cuisine to resolve the interstellar crisis, and the two join hands to establish the Interstellar Snack Office, staging a sweet romantic comedy spanning across planets.