Dolores travels with El Lazo and William on a train through Ghost Nation territory. As William and El Lazo play cards Dolores looks out the window and sees staked heads lining the train tracks. El Lazo explains that the Ghost Nation did it, calling them "the most savage tribe there is.”
Dolores and William have a conversation, where Dolores tells William that she does not want to go back to her old life, and he opens up about his search for meaning in the park. Struggling with his feelings, William tells Dolores about his fiancée back home; Dolores is hurt by the news and exits the train car. William goes after her, asking: “how can I go back to pretending when I know what this feels like?” He kisses her and they make love. The next morning Dolores shows William a new sketch, calling it "the place where the mountains meet the sea.”
The train suddenly stops and El Lazo sees that the train is surrounded by Confederados, who begin firing on the train using heavy artillery. As a distraction the survivors in the train send out Slim's nitroglycerin-filled corpse, dressed up with a white flag, and El Lazo shoots it, causing an explosion. In the chaos the survivors ride away, and the Confederados pursue them, managing to kill many of them until only Dolores, William and El Lazo are left.
As they are about to be killed the Confederados are attacked by Ghost Nation warriors, who kill them all, allowing the trio to escape. They ride until they come to a landscape resembling the one in Dolores' sketch. She and William decide to go their separate ways from El Lazo.