Shen Mobai is the youngest agent at the Juntong Shanghai Station, codenamed Cuttlefish. One rainy night in 1939, he was betrayed by his superiors while delivering a list of Japanese military material transfer stations. He was stabbed in the chest and jumped from the second-floor window of the Paramount Ballroom. When he opened his eyes again, there was a strange system in his mind. It could convert the difficulty, risk and intelligence value of completing the task into energy points, which could upgrade his radio communication, code deciphering, lock-picking and shooting, and even close combat. He must disguise himself as a money-hungry and death-fearing young translator in the Japanese military secret service while secretly sending intelligence back to Chongqing. Every time he completes a task, he is closer to uncovering the mole who pushed him down the stairs; every time he levels up, the system also reminds him that the upper limit of his lifespan is still shortening. Shen Mobai counted the days on the tip of the knife and climbed up, turning the enemy's intelligence into his own military exploits. Finally, he personally participated in the surrender ceremony and covered the tomb with his brother's medal.
