One year after the defeat of Gaea, Camp Half-Blood and Camp Jupiter have settled into an uneasy peace. The Seven—Percy, Annabeth, Jason, Piper, Leo, Hazel, and Frank—have returned to their lives as best they can, scarred but still standing. Thalia Grace watches over her brother from the Hunter’s side when she can, while other demigods drift in and out of the camps, training, arguing, and trying not to notice how quiet the world has become without monsters clawing at the borders every other night.