
S01E01 Crimeless City
Part 1 deals with Woo Jin and his twin brother Beom Gyun. Beom Gyun has been following the tracks of an alien they both saw when they were young. Part 2 is about a murder...
In Part 1, Jeong Yeon gets attacked by a woman that claims that she’s an alien and shows Woo Jin a picture of her with the toy star that he gave her 10 years ago. In Part 2, Bluebird leads Joon Hyeok to his past to find out who he is. It turns out he is Beom Gyun, and Bluebird is Jeong Yeon.
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.