In the undercurrent of the espionage defense line, four intelligence officers with out-of-character personalities, Bian Ke, Leqiao, Wu Yang, and Xi Wu, gathered together. While others engaged in espionage and worked calmly and diligently with their acting skills, they relied on endless complaints and unexpected tricks to resolve the crisis. They turned countless fatal undercover missions into hilarious scenes, and smoothly dug out the enemy's deepest core secrets along the way.
