Percy Jackson(The Elites)

A girl named Mary.She is a demigod,Yes a demigod a person who has one human parent and god parent.Other than that she sets off on a journey to find Zeus's lighting bolt and to go to Hades domain-The Underworld.Mary has to find answers about herself.Like who's controlling her and who wants her to kill her friends...She must defeat her enemies and the monster on the way.
Well I wonder how this chaotic journey will have?