The series is exclusively devoted to the story of a group of teens - Eliza Taylor , Bellamy Blake Bob Morley , Octavia Blake , Marie Avgeropoulos , Jasper Jordan , Christopher Larkin , Raven Reyes , Lindsey Morgan , Finn Collins , Thomas McDonell and John Murphy - as they are among the first people from a space habitat , The Ark , to return to Earth after a devastating nuclear apocalypse .
The TV series The 100 follows the lives of teens from The Ark .