Martial law is imposed on the city. When Cheong-san is separated from the rest of the group, On-jo leads a mission to use a drone to locate him.
Episode rating
Cast of episode
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- Lee Cheong-san
- Choi Nam-ra
- Lee Su-hyeok
- Nam On-jo
- Yoon Gwi-nam
- Jang Ha-ri
- Park Mi-jin
- Song Jae-ik
- Oh Joon-yeong
- Yang Dae-su
- Han Gyeong-su
- Kim Ji-min
- Min Eun-ji
- Nam So-ju
- Jang Woo-jin
- Lee Byeong-chan
- Seo Hyo-ryung
- Park Eun-hee
- Jo Dal-ho
- Jung Min-jae
- Kim Cheol-soo
- Park Hee-su
- Kim Woo-shin
- Yoon I-sak
- Lee Cheong-san's mother
- Jin Seon-mu
- Medical Officer
- Prime Minister
- Subway Creator 1
- Nam So-ju