They need to convince the Grounders. Pike questions Bellamy about what happened between the last report to the Ark that the Grounders were attacking, and the newfound truce. Jasper remarks that Clarke killed Finn, too. Jaha tries to talk Murphy down, promising he can unburden Murphy as Jaha was unburdened. He doesn't believe the Grounders can be trusted to maintain the truce. Roan pretends to have drowned until Clarke loosens her grip and then turns the table, holding her under water. Jasper tears apart a room of artwork searching for Maya's favorite painting.
Murphy is still distrustful of Emori, but she jokes that he'll just have to keep an eye on her. Octavia comes in and comforts him as he cries about it. Monty tries to find out from his mother how his father died. Clarke attacks Roan once he stoops to refill his canteen in the lake, trying to drown him. Emori explains that she and Otan steal tech and give it to Alie's deformed man in order to survive.
Clarke questions why Roan hid from his people; he counters by asking why she ran from hers. Roan leads a bound Clarke until she collapses, apparently unconscious. Reunited with the survivors of the space-station Ark that fell to Earth, Clarke Griffin and her band of juvenile delinquents have faced death at every turn: from a world transformed by radiation to the fierce Grounders who somehow managed to survive it, and the double-dealing Mountain Men from the fortified Mount Weather, whose civilized environment masked a horrible secret. Clarke: In peace may you leave the shore. Monty notices that Bellamy is gone and has stolen the clothing of a dead Ice Nation soldier to go look for Clarke.
Kane gives Pike directions to get his people to Arkadia, where they will be safe. She leaves after Kane assures her that they will find Clarke. Abby consults Lincoln, who asks her to take Nyko there to save him, because he is his friend. Safe passage on your travels until our final journey on the ground. He claims that there is still time. Murphy tries to stop him but the man comments that there is no pain in the City of Light. Octavia leads her people towards Shadow Valley against the advice of Clarke and Bellamy; Kane and Abby adjust to a new set of challenges.
Bellamy explains that they had a common enemy, who was defeated. He threatens to cut her hand off, but is shot dead at the last moment by Bellamy, who arrives with the rest of the group looking for Clarke. Emori promises that she and Otan will split whatever is in the stolen case with Murphy. Octavia is forced to take guidance from an unlikely ally when the future of the bunker and all those inside it is jeopardized. Clarke looks at Roan and realizes he is Ice Nation. Though Clarke was alternately challenged, supported and betrayed by her own people and alliances with the Grounders, they could always find common ground in survival.
The people of Farm Station are led by Charles Pike, a former Earth Skills teacher on the Ark, who reports that there are only 63 of Farm Station left -- two-thirds of their number were killed by Grounders, including Monty's father. Roan sneaks up and takes Bellamy out, threatening to kill him. She changes the subject, commenting that the most important thing to his father was to find Monty. Hannah and Pike tell Monty that his father died saving kids who were being slaughtered by Grounders when they first got to the ground. Monty, Bellamy, Indra, and Kane are attacked by masked people after being stopped by the felled tree. The man that Emori killed appears suddenly, apparently alive and no longer deformed.
Some of them were lowered to the ground. Murphy jolts Jaha out of his meditation, telling him they are ready to go. Clarke manages to grab a knife off of one of the dead scouts and stabs at Roan non-fatally. Roan keeps Clarke hidden in the underbrush when he notices Ice Nation scouts nearby, planning to backtrack and avoid them. Jaha and Otan appear suddenly in the City of Light with Alie.
Clarke: No, I won't accept that. Meanwhile, Clarke and Madi deal with the new, uncertain threat to their home. He and Hannah go along with the group searching for Clarke. Unbeknownst to Clarke, a team led by Bellamy and Kane journeys deep into Grounder territory to save her. Indra informs Kane that she is going off to alert the Commander that Ice Nation has crossed the border and is moving to attack her people. Otan releases Emori at Jaha's command.
Bellamy leads the charge investigating a potential way home. Inside the camp, Abby checks in on Jasper, trying to get him to talk about losing Maya. Otan returns and tries to take the case from them. Nyko awakens and thanks Abby from saving him. They kiss until they're interrupted by a ride, Lincoln's friend Nyko the healer, riding towards Arkadia looking for help from Abby. Monty tells Hannah and Pike about what happened at Mount Weather.