Chen Duoduo, an ordinary young man on earth, was accidentally involved in an alien adventure. Along with his friend Wang Xiaopang and security specialist Liliana, they were taken aboard a spaceship by Geertz and his shape-shifting pet Aguda, and they embarked on a farce-like interstellar journey. They accidentally broke into an alien black market, were involved in a cosmic beauty pageant, uncovered the conspiracy of a galactic giant, and were mistakenly identified as the "saviors" who could subvert the regime. Along the way, there were constant crises and a lot of jokes. They used wisdom and humor to resolve the crises, and gradually grew from a piece of loose sand into an invincible team. In the end, they discovered that the "alien" in each life is where the value lies. The book has a compact structure, fast pace, and ups and downs in the plot, explaining growth and self-identity with laughter and tears.