The story, without spoilers
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.
Cast & characters
Lee Ha-na
Kang Kwon-ju
Song Seung-heon
Derek Jo
Son Eun-seo
Park Eun-soo
Kang Seung-yoon
Han Woo-joo
Kim Jung-ki
Park Joong-ki
Song Boo-gun
Goo Gwang-soo
What to try next
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