After changing out of their office clothes, engineers head toward the National Museum of Natural Science to serve as docents. Putting aside the status he once had, a retired school principal works in a library quietly putting books back on the shelves .... Over human history, technology, culture, national systems and social customs have constantly been changing.
脫下無塵衣，科技新貴開車到台中國立自然科學博物館擔任最專業的導覽志工；放下曾經有過的身份，一位退休校長在圖書館裡，安靜地將一本一本的書，放回架位...... 歷經千百代時光嬗遞，人類的科技文明經變遷，國家體制、社會風俗幾番蛻變。