Three people who go from comrades to enemies to protect their loved ones. Can they truly protect those who are precious?

As the inter-Korean talks faced the threat of collapse, Kim faced a desperate crisis under pressure from the special bureau led by Minji.

Manager Kim is captured and tortured — until the Special Missions Directorate steps in with a final mission. Ju Gang-chan makes a plan to get revenge. 

Manager Kim and Min-ji finally reunite, but the path to safety is far from smooth. Later, Manager Kim is forced to make a difficult decision. 

Min-ji finds herself in a dire situation — until special agent Jung Sang-a shows up. The Special Missions Directorate tries to lure out Manager Kim.

Manager Kim trades blows with the enemy agent chasing him — only to realize he is an old friend. Meanwhile, Min-ji attempts an escape of her own.

Manager Kim's risky actions put him on the radar of enemies past and present. When danger strikes, Han-soo and Jin-cheol step up to help save the day.

Manager Kim reconnects with Sung Han-soo and Park Jin-cheol — his fellow dad friends (and former secret agents) — on his search for Min-ji. 

Frantic to find where Min-ji is, Manager Kim uses his skills from his days as Agent Kim — a secret agent who specialized in ruthless enemy takedowns. 

Manager Kim, an ordinary middle-aged man who gets grabbed by the collar even by the neighborhood thugs. His estranged daughter Minji suddenly disappears just before her birthday. Manager Kim sets out to find Minji.