Since the war Percy has been on a downward spiral. He left camp, became withdrawn and was officially dubbed as the weird new kid at beacon hills high school. All of this because he lost the most important person in his life, his very own wise girl. On top if that he lost his best friends, he lost the rest of the seven as well.
It is Scott McCall and Stiles
who dive headfirst into the pool of despair, guilt and self pity to save him. When they don't even know what they're saving him from.
Disclaimer: all rights go to Jeff Davis and rick Riordan. Except the plot that's mine.