Clary glanced up from the Codex at Luke across the table from her. He was going through papers, probably bills, nervously fiddling with the pen. Something was obviously on his mind. Clary looked back down at the Codx, trying to ignore Luke, and concentrate on the information in front of her. It didn't work. "What's on your-" Clary began, but at that moment Jace walked out of the bedroom and pulled a coke out of the fridge.

"You know that this isn't your house, right?" Luke said, looking up from his papers.

Jace shrugged and sat down next to Clary. Clary leaned her head against Jace's shoulder. "How are you doing?" She whispered.

"Good." He whispered back. "What are you thinking about?"

Clary looked up at her boyfriend. "How did you-"

"You have that look on your face." He explained, waiting for her to answer the question.

Clary smiled. Jace was the perfect boyfriend. "Something's troubling Luke." She said.

"Ah." Jace nodded and looked over at Luke. "Do you want me to ask him what's wrong?" He whispered.

"I'm not deaf." Said Luke from the other side of the table. "In fact, my hearing's better than both of yours."

"Werewolves." Jace muttered.

"I heard that." Luke looked up from the bills at Clary. "Do you know a boy named Percy Jackson?"

Jace spat his coke all over the table in front of them. "Why is this kid so popular all of a sudden?" He asked.

Clary ignored her boyfriend and looked at Luke. "Were you talking to Simon?" She asked him.

Luke nodded.

Clary shook her head. "Simon seems to think that this kid isn't human." She said. "Which is totally ridiculous."

"He isn't human." Luke said sincerely.

"How do you-"

"It's easy to tell after a while." Luke said. "And I could tell that this kid wasn't human."

"So you met him?" Asked Jace with a raised eyebrow.

"Yes."

"And what did he seem like to you?"

"Like a demigod." Luke said quietly.

"A demigod?" Jace nearly shouted. "But those don't exist. They're a myth. Like Bigfoot. Or the Lochness Monster. Or-"

"Werewolves?" Luke interupted. "Never believe that something isn't true until you know that it isn't."

"But they're not." Jace said. "The Clave-"

"Hasn't told you the truth in the past. So, why would they tell you now?" Luke looked at Jace. "Demigods are more than just a myth."

"Have you ever met one?" Asked Clary before Jace could argue again.

"Several years ago I knew a young girl who lived down the street. Her mother wasn't exactly on it, and she ran away later, but she seemed to be able to control the weather." Luke shrugged. "I never knew her father."

Jace shook his head. "One girl being able to control the weather? That means nothing. She could of been a warlock."

"She could have." Luke nodded. "But that was very unlikely. I would bet my life on it that she was a demigod."

"Suppose she was a demigod or whatever." Jace said. "How could Shadowhunters go this long without finding out? Surely someone in the Institute would know."

"Someone in the Institute might know." Luke said.

Clary glanced at Jace for a second, wondering if they were thinking the same thing. It seemed very likely that what Luke said was true. She didn't like the Clave or trust them. She didn't expect them to tell the truth. "I believe you." She said to Luke.

Jace looked at her with a hurt look in his eyes. "But who-"

"Isabelle." She said. "Isabelle knows."

Isabelle was in the training room when Jace got back to the Instatute. He paused in front of the door, watching her for a while, and wondering wether or not he was really going to ask her. Clary had threatened him, saying that if he didn't, then she would.

"Are you going to keep standing there looking helpless?" Came Isabelle's voice from across the room.

Jace sighed and entered the training room, picking up a set of daggers and throwing them at the nearest wall.

Isabelle glanced over at him as he did so. "What's bothering you?" She asked, giving a lethal blow to the punching bag.

Jace shrugged. "Clary wants me to ask you something."

"Which is?"

"Do you know a kid named Percy Jackson?" Jace asked.

Isabelle didn't even falter. "No." She said truthfully. "Why? Is he important?"

Jace shook his head. "I don't know. Clary and Luke think that he's this thing called a demigod."

Jace watched as Isabelle stopped hitting the bag. "A demigod?"

"Yeah." Jace said. "Like some sort of half god person." He looked at Isabelle as he threw a knife. "You ever heard of that?"

"No." Isabelle said and Jace knew that she was lying.