Clarke Griffin and the survivors are faced with a new challenge: with the worldâ€™s remaining nuclear reactors melting down, the human race faces extinction. End of the world may happen very soon. But the nuclear disaster is not the most dangerous threat in The 100 season 4. They destroyed the artificial intelligence, but it's only the beginning. New even more dangerous villain appeared on the horizon. Many people have already come to terms with their status quo. But Clarke and her friends are ready to fight for their lives and the life of the human race. Who will survive who will be cut?