主角阿弟仔來到故宮參觀，卻奇妙地跟著從翠玉白菜上溜走的螽斯進入「國寶迷宮」，在裡頭遇見了乾隆爺，兩人合力解決路上遇到的各種麻煩事，成功找回溜走的螽斯，還給了翠玉白菜......影片還原故宮文物所在的時空情境，結合與文物相關的古今對應生活禮儀，深入淺出傳達愛惜文物、親近文物的情感，可說是進入正館參觀最好的實體行前教育活動。
The main character, Idea, visits the National Palace Museum and magically follows the katydids that escaped from the Jadeite Cabbage. He enters the "Maze of National Palace Museum," where he meets Grandpa Qianlong. Together, they join forces to find the lost katydids and resolve the troubles encountered along the way. Successfully finding the lost katydids, Idea and Grandpa Qianlong return them back to the Jadeite Cabbage and the film returns back to the spatial setting of the National Palace Museum. Combining the etiquettes related to ancient and modern antiquities, this film conveys the importance of cherishing artifacts and provides an intimate view of the treasures. This film can be said to be one of the best introductory educational activities prior to visiting the museum.
