In the dead of night, the Stoll brothers wandered into the Poseidon cabin, trying to be as silent as they possibly could. Connor almost couldn't push back a laugh as he looked at the blue hair dye in his hands. The brothers walked over to Percy, and waited for some time.

The son of Poseidon was dead asleep. The brothers climbed onto the bunk bed, so that they were at the same level as their victim. Travis softly grabbed a lock of his hair, and connor put a piece of foil under it. His brother put the blue paint on the lock. They waited for a few minutes, and then put some water over the lock.

The lock got an amazing blue colour. Connor rolled his eyes. They dyed a few more locks, until they ran out of blue dye. They softly climbed of the bunk bed, and made their way out of the cabin as fast as they possibly could.

'Why does it look so good on him?' Connor whined. Travis shrugged. 'Poseidon's genes, I guess,' he answered. 'Sure. Now, how did you want to get the doors to the big house open?' Travis smiled. 'I thought you'd never ask.'

Simply with the key, Travis opened the door to the Big House. 'You know how Chiron called us into his office because we threw a paintbom in the lake? This key was just laying on his desk, out in the open.' Connor giggled. 'That's stupid. You never know who sees it.' They walked into the Big House.

'So, the bedrooms of the staff are upstairs. I go and sabotage the locks, you get the purple hair dye.' Travis walked out of the house again, while Connor tiptoed upstairs. As he entered the central chamber, he felt a weird force come over him. He stood still for a while, but walked further into the room as nothing happened.

He looked around. The living room looked pretty normal. There was a square oak wooden table in the middle, with three chairs around it. Against the wall stood a bookshelf and a couch. There were two doors leading to other rooms.

Connor tried the first door. It was a bathroom, with three toothbrushes - all in another cup. He tried the second door, which lead to a hallway. Connor heard someone on the stairs, and froze. A few seconds later, his brother appeared, with a bowl of purple hair dye.

Together, they walked down the hallway. Their were about ten doors, seven of which were open. Three others were closed. Travis tried one of them. It was locked. He pulled out his key, and opened the door. Behind it was Argus' bedroom, so Connor quickly closed the door again. 'I don't think he saw me,' he said as he tried the next door.

The next room was Dionysus' bedroom. Connor grinned. Travis held up the bowl of hair-dye. The walked over to the bed, and did the same thing to Dionysus' curls as they had done to Percy's straight locks.

The next day, everyone went to breakfast as usual. Except that a certain Son of Poseidon and a certain God of Wine were missing. Chiron looked around, and asked if anybody had seen one of them. The Stolls kept a poker face.

Neither of the victims of the prank showed up during breakfast. After the meal, the Stolls walked over to the Poseidon cabin. Nobody was there. They shot each other a look, and walked to the Big House.

Chiron stood in front of it. 'What's wrong, Chiron?' Travis asked. 'The door's locked and I lost my key. And I hear voices coming from behind the door, and they don't sound very happy.' Travis pulled out his key, looking a bit ashamed.

They opened the door, only to find Dionysus and Percy bickering with each other, like they always did. Both of them had streaks dyes into their hair, and were clearly blaming the other for somehow being the cause of it. The Stolls fell to the floor laughing, and both victims looked over at them.

Travis stared back, and decided that there would be some kind of revenge for the Hair dye prank. Both of them ran out of the house laughing their heads off. We thought we could do it to bring everyone closer together, so there would be peace in camp! Travis shouted over his shoulder.

Inside, Percy and Dionysus were still staring at the door. Percy swallowed, and looked at the other victim. Silently, both of them sat down and got out a piece of paper. Because there would be, in fact, consequences for painting their hair with magical paint.