The series follows a group of post-apocalyptic survivors, chiefly a group of criminal adolescents, including Clarke Griffin , Finn Collins, Bellamy Blake, Octavia Blake, Jasper Jordan, Monty Green, Raven Reyes, and John Murphy. They are among the first people from a space habitat, the Ark, to return to Earth after a devastating nuclear apocalypse. Other lead characters include Dr. Abby Griffin, Clarke's mother; Marcus Kane, a council member on the Ark; and Thelonious Jaha, the Chancellor of the Ark and Wells' father.
