He Jun, a history college student, accidentally came into contact with a mysterious jade pendant when he was interning in a museum. He traveled back in time to the Daoguang period of the Qing Dynasty and became a ninth-grade inspector. He is bound to the "Historical Truth Sharing System" and can get rewards as long as he reveals the historical truth. He investigated opium smuggling, solved major corruption cases, exposed foreign conspiracies, and even prevented a shocking case that changed the course of history. However, every time a truth is revealed, some people's interests will be touched, and the darkened villain begins to take revenge wildly. He Jun saved his life while completing system tasks, but found that his time travel was a carefully designed chess game.
