The ancient sword was hard to draw, its imposing presence reaching for the sky. According to the Daoguang-era edition of the Qijiang County Gazetteer, a thousand-year-old sword once stood on Chongqing’s Mount Gujian. After County Magistrate Du Lan took it away during the Yongzheng era of the Qing dynasty, it vanished without a trace! Three Qijiang university students follow the trail of Du Lan’s career and track down his tomb in Anhui, only to be told by cultural relics experts that the “ancient sword” was actually a misreported “ancient mirror.” Undeterred, the three turn to investigating the mirror. After many twists and turns, they not only uncover its whereabouts but also unexpectedly confirm that the ancient sword was no fiction: it was a genuine, priceless relic. Its ultimate fate is even more mysterious than the county gazetteer suggests, bringing to light a hometown secret buried for hundreds of years...