The Sharp Knife Passed Through

A seemingly ordinary counterintelligence surveillance operation, due to an unplanned "detour" and an unexpected "connection" by the target, gradually uncovered a spy network that is buried deep under daily life and far exceeds expectations. The core conflict of the story is not only tracking and counter-tracking, but also "trust" and "negligence" - the most dangerous enemies are often hidden in the "holes" left by oneself inadvertently.