After Aliens arrive, the story takes place in two time streams: 2017 and 2037. In twenty years, and by 2037, the world has been divided into a “Smart Earth” where artificial intelligence has created a utopian environment in which no diseases or crimes exist, and an “Ordinary Earth” where people still suffer from rampant plague and lawlessness.


Circle (2017)
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Yeo Jin-goo
Kim Woo-Jin (12 episodes)

Kim Kang-woo
Kim Joon-Hyuk (12 episodes)

Gong Seung-yeon
Han Jung-Yeon (12 episodes)

Lee Gi-kwang
Lee Ho-Soo (12 episodes)

Kwon Hyuk-soo
Detective Oh (12 episodes)

An Woo-yeon
Kim Beom-Gyoon (12 episodes)

Kim Joong-ki
Kim Kyu-Cheol (12 episodes)

Min Sung-wook
Lee Hyun-Seok (12 episodes)

Nam Myung-ryeol
Yoon Hak-Joo (12 episodes)