Percy was unsure of whether to fight or run away. But before he could make up his mind, Sans threw a bone at him. He dodged, but it nicked his arm. To his surprise, the wound turned purple. It felt like the pain of touching hot oil multiplied by 100.

Percy cried out, and barely dodged another bone. Sans grinned. "A sinner, eh? I can tell. Karmic retribution only affects sinners." He glared at Percy. He tried freezing Sans with all the water in the cave. No such luck. He simply teleported out of the way and kicked Percy in the stomach. Or at least, tried to.

Percy grabbed his foot and tossed him out of the cave. Sans teleported on top of him, knocking them both to the ground.

Sans was the first to get up. He teleported behind the fish monster. "I'm exhausted," he told the fish monster. "Can you take him out, Undyne?"

"You bet I can!? Undyne replied. She raised her spear to strike. But instead of striking Percy, she simply waved her spear in front of him. Percy attempted to strike. His legs refused to move. He looked down.

His legs were immobilized. He took out the shield that Tyson gave him. He raised it. Wait a minute, he thought. He collapsed to the ground and tried to roll out of the cave. Everyone seemed to shocked to stop him.

He succeeded rolling out of the cave. When the mobility returned to his legs, he stood up and made a platform out of ice. He then lifted himself up and the platform carried him back to the gas station. His mom was happy to see him. Then she slapped him.

"Don`t. Scare. Me. Like. That. Ever again!" Percy laughed. "Good to see you too, mom." They both heard a "Yeah! There they are over there!"

"Time to go," Percy said.

They made it back to Camp Half-Blood. Things were pretty normal, until Chiron called him to the big house, along with Annabeth and Grover.

"First off, I`m glad you're back, Percy." Chiron clapped him on the shoulder. "But as you might have suspected, I have a quest for you." "Blaaah!" Grover bleated. "Can we have a little time to have Percy settle down? Actually, for me to have lunch?"

"I`m sorry, Grover, but this is of the utmost importance." He took a deep breath. "There are dangerous, new monsters on the loose. They are-"

"Two skeletons, One fish monster, two goat monsters, and a human kid."

Everyone stared at Percy. "Percy," Chiron said, "How did you know that?"

"Well, I was sort of captured by them. The shorter skeleton can send you flying without touching you. The fish monster can immobilize your legs by swiping her spear in front of you." He took a deep breath. "That`s all I know."

"Well, thank you for telling us this," Chiron said. "You leave tomorrow at noon."