Percy, Annabeth, Frank, Hazel, Piper, Jason, and Leo are off to the fight of their lives. To Athens. Where Gaea has already started to rise. Reyna, Nico, and Coach Hedge are escorting the Athena Parthenos to Camp Half-Blood. This will repair the raging war the Greeks and the Romans have had for ages. Will they all make it in time? Or will Gaea rise before they can do anything?