After leaving Camp Arkadia due to her inability to accept her actions, Clarke sets out on her own, dealing with her emotions while encountering new challenges. Camp Arkadia begins to see political turmoil as the hunger for power mounts.
Now with Clarke in her possession, Lexa has the power to force Skikru to become one with the grounders. Kane and Abby journey to the Polis Summit, while the Ice Nation prepares to draw first blood against Skikru and the other grounder clans.
Anger and lust for vengeance and justice from the clans threatens Lexa's position. Murphy unveils new secrets about the identity of Polis. Meanwhile, a dangerous coup brews against Clarke and Lexa and their trust for each other is tested.
Jaha employs a terrifying new method to convince Abby to join his cause, Kane is on a mission, and Bellamy is hit with a hard truth. Meanwhile, Monty finds himself in a precarious situation, and Jasper rushes to save one of his own.