Shen Du, the youngest restorer of ancient paintings at the Palace Museum, has an unknown secret: as long as his fingertips touch ancient paintings, he can enter the world in the paintings. Those still landscapes, figures, carriages and horses are actually sealed real history - every famous painting is a "time prison".
In the Southern Song Dynasty's "Lu Book and Jade Ribbon Picture", the position of a guard in the honor guard moves one millimeter every day. Shen Du sneaked into the painting, and the guard left a blood letter: "The Jingkang incident was not caused by the Jin people." From then on, he was forced to be involved in a conspiracy that spanned eight hundred years.
From the shadows of boats on the Bianhe River in "Along the River During the Qingming Festival" to the green peaks in "A Thousand Miles of Rivers and Mountains" to an "Untitled Landscape" that has never been seen before - each painting has a fragment of historical truth locked inside. The true identity of the appraisal authority Zhao Heting is actually the descendant of the "Painter Secret Agent" of the Qing Dynasty. He vows to die to erase the evidence of the Manchus' entry into the customs.
When Shen Du discovers that the real reason for Yue Fei's death is hidden in the last painting, he must make a choice: disclose the truth and subvert the thousand-year history book; or seal the secret forever and become an accomplice of history.
The evidence of the country's subjugation is hidden in the painting, and the murderous old friend stands outside the painting.
