Signal

Present-day detectives communicate with a detective from the past through a walkie-talkie, joining forces to investigate long-unsolved cases. Their unusual connection links investigations across time, creating a tense mystery built around evidence, choices, and the consequences of reopening the past.

My take

You’ll likely enjoy this if you want tense Korean crime mysteries with a time-bending premise, interconnected cases, and little romance; Not for you if you dislike open-ended stories, occasional confusion, or slower stretches.

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