So your entire camp was invited to Mount Olympus to celebrate New Years with the gods, as a massive thank you for all of your camp's assistance over the year (Zeus had to be bribed to agree to this, he's a prideful man-child).

So you file in with all your friends, looking around the massive throne room. Chiron was doing his best to keep order, but the Stoll brothers were already missing. Everyone was sent to stand with their godly parent for the time being, or at least check in with them before going off to talk to their friends again.