Gaea, is finally on the verge of waking. As impossible as it seems to kill the earth mother who is pulling all the strings backstage, she discovers she has one weakness; Annabeth Chase. Annabeth has sacrificed everything, now it's her life that's at stake. Meanwhile, Percy will do anything to keep her safe, even if it means putting the world at risk. It's game on!

The Giants have risen once again, and now Gaea needs the blood of Olympus in order to reawaken from Tartarus. Percy must protect his friend at any cost. Reyna needs to bring peace between the Greeks and Romans. Leo has been having dreams of a strange goddess veiled in shadows, who warns of the betrayal of his friends. Everyone has something to lose. . . Who will survive in the end?