At the edge of the radioactive Wilds, Ellie and Abe encounter a creature that embarrasses them both. Life becomes unbearable, and they both hatch a plan to head out from the wall into the Wilds. Abe's plan is to find his lost uncle, and Ellie's plan is to kill Abe. But when Ellie is mauled and almost dies, Abe has to decide if being her target is enough to let her go. He doesn't know that her father has begun to stalk them both. The wall cannot hold old vengeance, lies, and the secret that lies beneath World City Bela.