Percy, Annabeth, Piper, Jason, and Leo have changed. No, not overtime, but overnight. Last night, they were totally normal, well as normal as they could be, and today, they are their opposite selfs.
Now Nico is forced to drag these five characters all the way to the Andes mountains in Chile, unless he wants a few of his only friends to change to their opposite selfs, forever.
Warning, all these characters are not mine, only the plotline is mine. The characters belong to Rick Riordan.