After a botched operation puts Hae-sung and his team in serious jeopardy, the only way for him to salvage his career ...

Hae-sung comes dangerously close to blowing his cover while searching for the hidden gold in Byeongmun High School's ...

Hae-sung uncovers a crucial clue hidden within the old building, but Chairwoman Seo quickly learns its potential conn...

Hae-sung attends the anti-bullying committee session with a key witness who clears his name, while Dong-min finally f...

Hae Seong and the team grow increasingly concerned that Su A's suspicions could threaten his undercover mission. Howe...

The school's security guard dies, leaving Hae Seong a notebook belonging to his missing father. The revelation is sho...

Hae Seong is caught off guard when he recognises Su A's childhood name, Bong Ja, which stirs memories of his first lo...

After uncovering the possibility of a mole within the NIS, Hae Seong becomes increasingly distrustful of those around...

As Su A recovers in the hospital following the attack during the break-in, Hae Seong and the team uncover the culprit...

To everyone's shock, Seo Myeong Ju returns to the school. Unimpressed by Hae Seong, she expels him and demonstrates h...

The gold bars vanish just as they are within reach, and Seo Myeong Ju suspects Hae Seong has them. In the vault, Hae ...

Despite getting badly injured, Hae Seong manages to call Su A and his team. They conclude that the only evidence they...