Ha Chae-Yoon is a police woman and is sent to a hostage-taking as a negotiator. Even though she does not have any information whatsoever about the case when she talks with the hostage-taker for the first time, who introduces himself as Min Tae-goo. He specifically asked for her and one of his hostages is her captain. The other hostage is a reporter. Chae-Yoon hardly gets any information from her superiors and something seems off about this case.
Tae-goo is a weapon dealer, who is managing his operations from Thailand, even though he has British papers. Apparently, the Korean secret service, NIS, had been on his tail for a while now, but Chae-Yoon has no idea what his reasons for this hostage-taking might be. Along with her own team she keeps researching the case’s background and the hostage-taker himself is also interested in her finding out more. There seems to be more to the hostage situation than meets the eye.