Something is up at camp. Percy and Nico have discovered they have sisters, Alex and Alli. Or Allison if you care that much. They arrived one day, accompanied by Grover and another girl, Kayla. Who starts to act rather... suspiciously. Percy has to save the world yet again, and this time it's not from a being from the world of the gods. Join Percy, his sister Alex, and Annabeth as they delve deep into the world of magic.