Percy Jackson & chaos' soldiers

Pain. Hurt. Cheated. Betrayed. These are just some things Percy has felt because of those he cared for. He joins Chaos. What will happen when he is assigned a new mission and has to return? What happens when he finds out that the whole universe is in trouble and not just Earth? Will he be able to save everything ever created or is he in over his head? -My first story please read :D