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Original Language:KO
First Air Date:14 Jan 2017
Last Air Date:31 Jul 2021
Number of seasons:4
Number of episodes:58
Episode runtime:60 min
Status:Ended
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3.5
/ 5
58 votes

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TV Series • 2017 • TV-MA • 4 Seasons • 58 Episodes

It's 3 minutes for hearers, but a life for the callers. A crime thriller chasing even the slightest sounds to rescue people's lives calling for urgent help.