The plague destroyed families. Dead bodies line the streets. Now immunity has started to develop, and whoever is immune develops a mark on their neck. There are many different marks, and people with the same mark join together in camps in order to survive. Enya and her brother Griffin, whose parents died from the plague, are both immune. Enya has no desire to join a camp and is fine to live with her brother. But when Griffin goes out to get food one day, he doesn't return. Enya's only way to surive is to join a camp. There's only one problem: she doesn't have a mark. When a nice stranger named Xavier decides to help her, he realizes she's more work than he thought, but he tries to stay by her side. Enya has trouble finding a camp, but eventually she finds one. She treats them like a family, even though her family is dead. At least, she's pretty sure they are. When Enya is forced to choose between love and blood, between loyalty and betrayal, will she make the right decision, or will everything burn to the ground?