Percy was sitting in his cabin. He hadn't seen any of his friends for the entire day. He thought that people would congratulate him with his birthday, seeing as how he wasn't going to be there tomorrow on his actual birthday. He sighed and got his suitcase out of the closet. He got permission to go to his mother the next day, so he might as well start packing.
'Leo, I need more streamers!' Piper ran into the the hall, screaming at the top of her lungs. Leo grabbed some more streamers (and some extra blue glitter) out of his belt, and threw it in her way. 'There is also a bit of glitter in the little plastic box,' Leo remarked. 'Thanks,' Piper murmured, while trying to get the blue glitter out of her hair. She walked back into the Argo II, which was floating around in Bunker 9. Jason was putting some balloons on Festus' head. The dragonhead was trying to get them of, but couldn't. Annabeth put down a blue cake on a table.
Leo climbed on board of the boat as well, petting his dragon on the head. He looked behind him, at the boat filled with streamers, balloons, glitter and cake. He got a remote out of his hand, which made the roof of the bunker open up. The boat flew out of the bunker, and up to camp Jupiter. They picked up Hazel, Jason and Reyna and went back to Long Island, where demigods were putting up more party supplies.
A car drove onto the beach. Sally, Paul and their baby got out, with Calypso, who had picked them up. They were brought to the back of the beach, but only after Sally had put some food on the tables. After everyone had stepped into position, and Chiron had walked onto the beach, Annabeth ran away towards the Poseidon's cabin, where her boyfriend was still hanging out. She knocked on the door, and Percy opened it. 'Hey Percy!' Let's take a walk on the beach!' She said.
' I have to pack, Annabeth.'
'I'll help you. Let's go.' Percy sighed, and followed his girlfriend onto the beach.
'HAPPY BIRTHDAY!' Everyone who showed up on the beach shouted as soon as Annabeth and Percy walked onto the beach. Percy stopped walking, and his mouth fell open. Annabeth laughed and pulled him further onto the beach, holding his hand. Sally walked up to her son, and hugged him close. Percy was still weirded out by the surprise party, but he had more and more fun as more people congratulated him.
The party lasted until 4 A.M., but after that most people had left or fell asleep on the beach. Percy walked over to his girlfriend, and kissed her on the cheek. 'Best birthday ever,' he told her. Annabeth smirked. She already knew.