Ji Sung, an NIS agent, is enraged and turns desperate after his colleague gets killed in Hong Kong after chasing Wang...

Incheon Airport goes into an emergency state due to Wang Wei. Ji Sung asks Do Kyung and Ha Jun for help, claiming Wan...

After taking shots at a work function, Do Kyung gets sick and Ji Sung helps her. In the process, the two talk and lea...

After missing Charlie, the suspected industrial spy and underboss of Triad, Ji Sung lashes out at Do Kyung. Ha Jun sc...

After a suicide attempt of the daughter of North Korea's top politician, the hospital becomes a special security area...

Runway Two is closed due to birds and operation headquarters try to devise a measure before the holidays. While Ji Su...

Do Kyung gets arrested after carrying luggage with drugs for her friend, Jung Min. For this, Do Kyung's office and ho...

Do Kyung is temporarily released with the help of the CEO. After coming home, Do Kyung is pleasantly surprised as her...

Do Kyung finally proves her innocence, but experiences severe reprimanding at work. Despite the staff worrying about ...

An error with the luggage system creates confusion at the airport. Trying to handle the issue, Do Kyung proposes that...

After finding that Sergei, the supernote forger, contacted a Russian mafia before being killed, Ji Sung raids the maf...

As the raised security level disturbs their operation, supernote forgers leave bags disguised as explosives within th...

Myung Woo faints and Do Kyung takes her to a nearby ER per her request. Myung Woo also asks her not to alert the airp...

Sun Woo holds Kang Hyung hostage and points a gun at Ji Sung. Michael, the vice president of Neo Airline, walks towar...

Sun Woo escapes from NIS's protection and fights a gang that attacked him. Ji Sung manages to locate him, but in the ...

When Do Kyung tells Ha Jun about Myung Woo's illness, he warns her not to tell Ji Sung, and that she must respect Myu...