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There are those who are born monsters, but there are also those who are made into monsters by people.
Detectives from the present and a detective from the past communicate via walkie-talkie to solve a long-time unsolved case.
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- Seasons
- 2
- Episodes
- 24
- Status
- Ended
- Next episode
- Episode 1 on 30 Nov 2026
- First aired
- 22 Jan 2016
- Last aired
- 12 Mar 2016
- Network
- tvN
- Created by
- Kim Eun-hee, Kim Won-suk
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