He was supposed to be killed. Killed for something he didn't do, but before that happens, he disappears... Percy Jackson had been happy, had a great girlfriend, and was finally over with the wars. At least, he thought. Until his half-brother, Eric, came. Power-hungry, he took everything from Percy, going as far as even taking Annabeth. When Percy is punished for a crime he didn't commit, he is supposed to die. But instead, he is saved. For over 2.5 thousand Chaos years, Percy travels the Universe until one fateful day when the one place he was trying to avoid is threatened. Earth. He returns to find that some things are not as they had seemed, and that something worse is hidden beneath it all...

Action packed pjo series of when Percy is betrayed and banished to tartarus along with Annabeth,Thalia,and Nico but are all found by chaos and made the top assassins of chaos and there job is to protect the galaxy but that also includes saving the very people that banished them.