The somewhat arrogant interstellar detective, Xiao Bei, accidentally crash-lands on Earth during a fierce battle while pursuing the cosmic bandit, Black Hole. On Earth, Xiao Bei encounters a human girl named Xiao Yi and the interstellar bounty hunter, Aurora. Meanwhile, the interstellar fugitive organization led by Black Hole is preparing to activate a star tunnel to destroy Earth. With the united efforts of Xiao Yi and Aurora, Xiao Bei gradually overcomes his shortcomings and grows into a true interstellar hero detective. Just as Black Hole is about to activate the star tunnel to annihilate Earth, Xiao Bei and his companions engage in a life-or-death battle to defend the planet...