The 100 follows descendants of post-apocalyptic survivors from a space habitat, the Ark, who return to Earth nearly a century after a devastating nuclear apocalypse; the first people sent to Earth are a group of juvenile delinquents who encounter another group of survivors on the ground./wcaDIAG1QdXQLRaj4vC1EFdBT2.jpg)
So the repressive regime picks 100 expendable juvenile delinquents to send down to Earth to see if the planet is still habitable. After arriving on a new planet, our heroes found a place where they hoped to try again.