In the 22nd year of the Republic of China, Peking.
The cultural relics of the Forbidden City are being secretly moved south. Three thousand boxes of national treasures must complete an unknown road before the Japanese artillery fire comes.
Fu Yanqing is the painter of this road. He engraved the whereabouts of each cultural relic into his heart, and also erased his name from the world - the person who did this must not be concerned.
Shen Zhaoning is the youngest female surgeon at Union Medical College Hospital. Her scalpel saved warlords, officials, underground party members, and a man covered in blood who was carried in late at night.
After the man woke up, he only said one sentence: "Don't ask me who I am."
She didn't ask. She just left a light outside his ward late every night.
Between them, there are unspeakable secrets, an era of broken mountains and rivers, and the fate of "if you pledge yourself to the country, you will never be able to pledge your favor again".
He escorted the cultural relics south, and she escorted the medicine north. Two roads draw a silent cross on the earth.
In his letters to her, he always said, "Don't think about it in peace."
Her reply to him was always, "The lights are still on."
What he didn't know was that the light she was talking about wasn't just the one in the hospital corridor.
[He is guarding the soul of the country, and she is guarding his way home]
