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.
Yeo Jin-goo
Kim Kang-woo
Gong Seung-yeon
Lee Gi-kwang
Kwon Hyuk-soo
An Woo-yeon
Kim Joong-ki
Min Sung-wook
Nam Myung-ryeol
Lee Hwa-Kyum
Seo Hyeon-cheol
Song Young-gyu
Oh Eui-sik
Kim Ye-joon
Jung Ji-hoon
Jung In-sun