Historical researcher Xu Jian fell into the gap between time and space in 1935, and old cases were covered with dust.
When I met a man in black in the alley on a rainy night, he said calmly: "My name is Zhou Xuan, and like you, I am a history graduate student who accidentally entered the dungeon."
He is extremely skilled and knows the rules of troubled times, and the two work together to crack down on the secrets of the Republic of China.
The dissipation of the gap is the separation. The two remember all the encounters, but there is no possibility of meeting again.
Purpose: To express the long regrets of a hundred years apart through a meeting across time and space; to express the preciousness of the stability of today's mountains and rivers with the obsession of people in troubled times for the prosperous times.