Overview: 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.
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First Air Date: Jan 14, 2017Last Air date: Jul 31, 2021Season: 4 SeasonEpisode: 58 EpisodeRuntime: 60 minutesQuality: HDIMDb: 7.10 / 10 by 58 usersPopularity: 78.658Language: Korean