If history is a battlefield where blood is spilled, then the future is the deadliest weapon.
Shanghai in 2021 is a city of the future that thrives in the intertwining of neon and history. The skyscrapers in Lujiazui on the other side of the Huangpu River are like sharp swords piercing the clouds, and the buildings from all over the world on the Bund are still reflected in the sparkling waves of the Huangpu River.
Shanghai in 1941 was an isolated island where bayonets and silver dollars bloomed abnormally. The latest perfumes from Paris are displayed in the window of the Xianshi Company on Nanjing Road, while the shantytowns by the Suzhou River are filled with groans of hunger. Under the neon lights of the concession, spies and agents follow each other closely, and loyalty and betrayal only occur in an instant.
In this undercurrent world of espionage, an intruder from 2021 will completely disrupt the chess game of history.
Gu Xiao, a history graduate student who is about to graduate in 2021, was supposed to be studying the past in a museum, but due to a mysterious pocket watch, he was accidentally thrown into Shanghai in 1941, and was mistaken for the ace military agent "Night Owl". He is familiar with China's five thousand years of history, but knows nothing about espionage; he can clearly know every historical event that will happen in the future, but he cannot predict his own life or death.
When Japanese spy agency chief Ryusuke Ito aimed his gun between his eyebrows, when military commander Xu Zhenyuan blocked a fatal bullet for him, and when the hands of his pocket watch began to rotate strangely - Gu Xiao had to make a choice: to be a bystander of history and sell his soul as a bargaining chip to return to the future, or to become a pawn to change the situation of the war without hesitation?
In this espionage game that spans time and space, one wrong step can lead to disaster.