Return Of The Betrayed Son Of Chaos

Hey guys, so this is my first attempt a writing a percy jackson fan fic. It probable won't be super great but please keep the comments nice. Ok cool now on to the description. Percy has been gone 6 months preforming the labors of Hercules so he can prove himself worth of proposing to annabeth, but when he get to camp he find annabeth and jason together and then posidon disowns him. Percy leaves camp but before he gets to far he runs into Chaos who gives him immortality and takes him to her planet utopia. But when the world is in danger can percy return to earth and save the very people who cast him aside and betrayed him?