He opened his eyes after he was betrayed and killed by the people who he trusted. When he opened his eyes again he was back in time. He did not know what he had done to go back in time but he would make them regret...and go to the other side. Pic ain't mine it's from Google Comments get deleted if i edit a para that ur comment was in as when i edit i usually basically rewrite that para and change it to something completely else so your comment would prob not make sense after i edit....

Percy goes to Beacon Hills after the Giant War to be refreshed on what it means to be normal. But is it as normal as he thinks? Read to find out!!