Choi Kang Hee and Joo Won finds out the truth about what is going on around Kim Soo Hyun.

In the 16th episode of the MBC drama "Level 7 Civil Servant" that aired March 14, Seo Won (Choi Kange Hee) and Kil Ro (Joo Won) receive help from their colleagues and continue their investigation.

In a situation where they couldn't trust either, Kim Won Suk (Ahn Nae Sang) or Oh Kwang Jae (Choi Jong Hwan), they had to make their own moves. Especially since it was a case involving his father, Kil Ro wanted to be the first to solve the case.

Seo Won and Kil Ro find out that Choi Heung Soo was trading weapons when he got caught by the National Intelligence Service for illegal trading. Kil Ro remembers a story that he heard from Kim Won Suk.

They then find out that Choi Woo Hyuk (Um Tae Woong) and JJ (Im Yoon Ho) are Choi Heung Soo's sons. The children who everybody believed to be dead had new identities as Kim Mi Rae and Choi Woo Hyuk in order to take revenge on the National Intelligence Service. Seo Won and Kil Ro hesitates when they figure this out.

When they meet a dead end, they request help from Jang Young Soon (Jang Young Nam). DNA results show that Choi Woo Hyuk and JJ are indeed siblings. Jang Young Soon alerts Oh Kwang Jae (Choi Jong Hwan) about the situation and shocks him.

It was too late since Oh Kwang Jae had given Kim Won Suk to Kim Mi Rae.