Undercover: Starting as an Ace Agent Through Sign-Ins

Su Cheng transmigrated.

On the eve of the War of Resistance, he became an underground Party operative, a hidden pawn inside the Military Affairs Commission in Jinling.

The good news: He was bound to a [Sign-in System].

Sign in at the training center and gain [Expertise in Hand-to-Hand Combat];

sign in at the Juntong headquarters and unlock [Exceptional Surveillance and Deduction];

even sign in at a dance and master [Microexpression Control].

The bad news: As soon as he arrived, he was named the prime suspect in the search for the Japanese spy “Pufferfish.”

And the real spy was none other than Zhou Qian, his comrade-in-arms.

To prove his innocence and climb the ranks,

Su Cheng made the first move. He offered a secret letter as his pledge of loyalty and entered the service of Juntong’s ace, “Ghost Six” Zheng Yaoxian.

From then on, he became a double agent:

In public, he was Sixth Brother’s sharpest blade, rooting out moles, foiling assassinations, and turning enemy agents. Even Mingtai from The Disguiser was his junior;

in secret, he was the organization’s deepest-placed spy, rescuing Zhang Li from Awakening in the dance hall and killing Japanese spy chief Araki Korechika single-handedly in a barbershop.

Then one day,

while signing in at the Shancheng Club, the System suddenly announced:

[Multiple espionage worlds detected merging. New mission issued, ]

[Become the one and only player behind every hidden plot.]