Series Two kicks off with Clarke and her friends trapped inside Mount Weather, a nuclear-hardened underground city where no one is safe, especially 'The 100'. When Clarke escapes alone, it sets off a chain of events for our trapped heroes, the adults on the ground and even the Grounders. Alliances will be made, friendships will be broken and justice will be served. With everyone fighting for their right to survive, our heroes will have to ask themselves a very important question: How far will you go to save the people you love? Many will fight, some will die, all will be changed forever in 16 earth-shattering, action-packed episodes.