Action:
The Earth became uninhabitable 97 years ago by radioactivity resulting from a nuclear war. The survivors arrived on a space station, the Ark, together. Due to limited resources prevail in the ward strict rules and a one-child policy. Each of an adult committed offense punishable by death. As it is clear that the Ark only stay a few months, until the oxygen is depleted, 100 criminal youths sent to perform a spaceship to Earth to using bracelets that send vital signs to the Ark to find out whether on earth you again can live.
Among them is the 17-year-old Clarke Griffin, daughter of the chief physician and the chief engineer of the Ark. Already during the landing on Earth there is a problem, so ends the connection to the Ark and the 100 does not arrive at the planned landing site. Meanwhile, the chancellor of the Ark is shot found, so his deputy Kane meantime taking the lead. As perpetrators Bellamy Blake is identified, his sister Octavia is also among the top 100. On Earth, the 100 but not alone, the addition Grounders provide natural disasters and disputes among themselves represents a mortal threat.