Guangtou Qiang, whose tour guide career has been repeatedly unsuccessful, accidentally picks up a lost shrinking flashlight. In an attempt to attract tourists, Guangtou Qiang has a sudden inspiration and builds a miniature amusement park. Just as Guangtou Qiang takes the two shrunken bears to experience the miniature park, a sudden storm hits, and the shrinking flashlight is lost! To return to their original size, the trio begins searching for the flashlight, traveling through the insect world of "Sleepless City" and human towns. Meanwhile, the insect villain Tekaopu learns the secret of the shrinking flashlight and attempts to seize it, plotting to rule both the insect world and the human world! What adventures will the bear and Guangtou Qiang trio encounter in the peculiar "microscopic world"? Can they successfully stop Tekaopu? What crises and dangers will Sleepless City face?