The ace agent Shen Ranran, codenamed "Night Owl", was judged to have sacrificed due to the failure of a top-secret mission and hid in the market. Three years later, the international undercurrent reappeared, and the old enemy returned with the deadly virus "Pandora". In order to prevent the crisis of destroying the country, he was forced to return to the world, but found that he had to join forces with his former partner who had personally "buried" him - Tang Nuoxi, the sharpest scalpel of the 9th National Security Bureau. When trust has long been shattered, the blades have to face the same enemy. In this secret battle related to the fate of the country, every step is a life and death chess.
