A psychological thriller where a close-knit group of intelligence officers discovers a traitor in their ranks — but everyone is too close to see clearly.

The tension in the first three episodes is genuinely gripping. The paranoia is well-shot, and the lead performance carries emotional weight.

By episode 5, the "who is the traitor" twist becomes repetitive. The subtitle "Such a Close Traitor" feels like a poor translation, and the pacing drags. The finale raises more questions than it answers — likely setting up a Season 2 that doesn't exist yet.