Mask aren't only for killers.
Officers Cho Kyung-yoon and Park Eun-joo are on the hunt a killer following duo of ghastly murders. The victims carry a common military past, and the secret of their past must be unraveled to find the killer.
Door Lock
All the Devils Are Here
The Vanished
God Is a Bullet
Revelations
Private Eye
The Beast
Believer 2
The Virtuoso
Black Site
Office
Vanishing
