Things are starting to happen .

Six years ago, that the end of the Titan war had ended, for a couple of years everything thing seem peaceful. Than a demigod and a legacy was found died in New Rome. There was no trace of how they were killed or how they died. Not only that Diana had gave Camp Jupiter a quest and a prophecy.

An uproar is rising against the gods, the west is in turmoil and injustice
Follow the wolf to the east, to find a home and bring justice
To bring down this uproar, an enemy must become friend
With the friend there is hope, without the friend the world would end

This made everyone worry and wonder who this enemy must be come a friend.