107.644 Views
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.
First Air Date : Jan 14, 2017
Last Air date : Jul 31, 2021
Episode : 58 Episode
Season : 4 Season
Runtime: 60 minutes
Studio: OCN
Country: South Korea