Having a house open to all of her friends was nice. It meant that Thalia was almost never alone and could always find someone to talk to. It made the house feel less lonely, and it also made it easier to avoid her stepmother. There was also a few downsides to an open house, mainly when her father was feeling generous and offering to watch Kore's step kids.

Thalia liked all of Kore's step kids well enough. Bianca, of course, was quickly becoming a good friend. She was also nice and willing to hang out with them. Hazel had been integrated into their group so much that Thalia forgot there was a time when they weren't friends. Nico was, well, Nico. He usually kept to himself and would find a dark corner to sit in.

This was not a usual time though. Thalia was sitting at the kitchen table and had her fork halfway to her mouth. She couldn't complete the action, as she was completely fixated on the argument in front of her. She knew that Bianca and Nico had been arguing a lot recently. She just didn't realize how bad it was though.

"Nico, let's just stop," Bianca said. Her fists were clenched tightly, and she was glaring at Nico. Her younger brother was glaring back. Thalia really wished that Nico had stayed at home, but Jupiter insisted that everyone come over.

Kore was apparently going on a small vacation and didn't want to leave her kids alone without anyone to watch them. Their butler, Charon, had also been given the week off, or he was escorting Kore on his vacation. Thalia wasn't really sure, and that was a whole scenario she didn't want to get into.

"You always want to stop. You're suppose to be someone that I can come to with my problems, but you never listen to me," Nico snapped. He looked down and shook his head. "You know that I am telling the truth."

"Nico, you are wrong," Bianca said quietly. There was this scary anger about Nico and Bianca. Nico's was usually louder and could be seen with his actions. Bianca's anger was more reserved, but you could hear it in her voice and see it in her eyes. Their anger scared Thalia, as she had already seen what Nico could do if his anger became too much.

"I am not wrong!" Nico yelled. He slammed his hand into the wall. "There is only one reason that you are spending all of this time with Diana. You are trying to replace our mother!"

Nico turned and stormed out of the room. Bianca watched him leave, but she didn't move. Her jaw quivered, but otherwise, she kept herself composed. Bianca turned the opposite way and left the room. Thalia lowered her fork and glanced over at Hazel.

"Well, this is awkward," Percy commented. He rubbed the back of his neck and ignored the look Annabeth gave him. "Should I try to talk to Nico?"

"I'll talk to Bianca," Piper said. She stood and left the room. Percy grabbed his sandwich and hurried the way that Nico went. Thalia awkwardly looked down at her food. She heard a door slam open, and she looked up. Her father walked into the room, and Thalia barely resisted the urge to glare.

It was unfair that her father had pulled her from missions. She focused on her food to keep any terrible thoughts from crossing her mind. A shadow passed over the table, and she slowly looked up. Jupiter looked down at her and spoke, "Why were you at city hall last night?"

"I wasn't," Thalia replied. She crossed her arms and looked at Annabeth. "Piper and Annabeth were working on a project with me. We stayed up until midnight, and I was the first one asleep."

"Go get your ID," Jupiter ordered. Thalia frowned and stood. She slowly walked towards her room. The ID card was something that all of the heroes had, and it would allow them to pass through the more secure areas of city hall. The cards had been deactivated a month or two before the Titans attacked city hall, as the Olympians thought they finally didn't need them. Now, the ID cards were needed to get inside and to get to anywhere important.

Thalia made it towards her room and walked towards her dresser. She always kept it there, as putting it anywhere else would cause her to lose it. Thalia made it towards her dresser and stared at the empty place where her ID card should have been.

Thalia frowned. All of her friends had an ID card, and none of them would take hers. That was one of their biggest rules. She know that she didn't misplace her card. It had been on her dresser since she had been suspended from missions, and since she didn't have a use for it, she didn't move it. Where the hell was it then?

After a few moments, Thalia braced herself and walked downstairs. She slowly made her way towards her father and spoke, "I can't find it."

"What do you mean you can't find it?" Jupiter asked. Thalia remained silent and didn't answer. "Who else knew about where you ID was."

"Just my friends. They wouldn't take it though," Thalia replied. The only one who would even think about doing something like that was Leo, and he wasn't stupid enough to try it. "No one outside of the heroes even knows that I have one."

Thalia thought over her last words and frowned. A memory came back to her mind, and she slowly looked at the wall. Maybe, there was someone who knew about her ID card, but it was impossible though. Thalia closed her eyes as she thought about the memory.

"We really should be getting ready to go," Reyna said. She looked up at Thalia and smiled slightly. Thalia smiled down at her girlfriend once again. She could still taste the hot chocolate on Reyna's lips. "We need to get to Annabeth's place and finish our project. I'd rather get it done tonight, so we have the rest of the weekend free."

"You're always so focused on school work," Thalia complained. She kissed Reyna again but forced herself to pull away. "As soon as we are done with this project, you are all mine. I haven't seen you all week."

Reyna laughed and gently tried to push Thalia off of her. Thalia didn't let her move and received a look. After a few moments, she huffed dramatically and stood from the bed. Thalia walked towards her backpack. It had been hastily thrown aside when they first walked into the room, as Thalia had a lot more important things on her mind.

Thalia's phone rang, and a sigh escaped her. Annabeth already knew by now to expect Thalia to be a few minutes late, so she shouldn't be the one calling. That probably meant that some criminal wanted to make a dumb decision and ruin her day. There was no way she was going to answer the call though.

Thalia walked towards her desk and grabbed her phone. She was relieved to see it was only a text. Thalia looked at the text from Annabeth and spoke, "How are we already thirty minutes late?"

"I've been trying to tell you that, but you wouldn't stop trying to shove your tongue down my throat," Reyna teased. Thalia felt her cheeks grow red, but she also saw the devious look on Reyna's face. "I guess it's best that you get it out of your system now. We don't want to traumatize Annabeth too much."

Thalia rolled her eyes and texted Annabeth back. Out of the corner of her eye, she studied Reyna. They hadn't been dating for long now, but at the same time, she felt like she had something great going with Reyna. It almost felt like her last boyfriend, but the big difference this time was that all of her friends approved of Reyna.

They had yet to take their relationship to the next step, but Thalia was ready to. She just wasn't sure if Reyna was, but that would be what the weekend was for. All Thalia needed was for her phone to stay silent and for all of the criminals in the area to just follow the law for one single day.

"Ready to go?" Thalia asked. She grabbed her wallet and then her backpack. Thalia double checked her pockets and then looked at Reyna. "Keys?"

Reyna gave her a look and walked towards Thalia's dresser. She grabbed the keys that had been hastily thrown there. As Reyna grabbed the keys, a curious look came to her face. Reyna spoke, "How did you get an ID to city hall?"

Thalia froze and tried to think of an excuse. The truth was that all the heroes had an ID to be able to get into city hall, but Reyna didn't know about her secret identity. That would be a bridge that they crossed later. Thalia spoke, "My dad has a lot of business at city hall, and he used to drag me there a lot. I got an ID for that reason."

"I heard these things are really hard to get," Reyna commented. She tossed the keys towards Thalia. "It's like they are hiding stuff behind the locked door of city hall."

"It's just a lot of tax stuff," Thalia said with a shrug. Reyna nodded and followed Thalia out of the room. If she was suspicious at all or didn't believe Thalia's story, she didn't show it. Then again, Reyna was lucky enough to be a normal teenager. She didn't have powers, and that was a good thing. Thalia just hoped she never dragged Reyna into her world.

Thalia snapped out of her memory and took a shaky breath. That memory had happened months before Reyna's death. One person outside of the heroes had seen Thalia's ID card, but Thalia knew that Reyna would not have told anyone. Reyna wouldn't even have a use for it.

"Last night, someone broke into city hall using your ID card," Jupiter said. Thalia slowly looked at her father and thought about voicing the memory. It was silly thought though. Reyna was dead. Thalia watched her die. There had to be another answer.

"Reyna saw my ID card before, and Mnemosyne went through her memories," Thalia realized. She looked up at her father. Thalia knew that the Olympians just wanted Mnemosyne to leave Olympians Plains and her life as a villain behind. It didn't seem like the Titan was going to do that though. "What would Mnemosyne want in city hall?"

"There is only one item that she would want, but it is hidden in a vault. Our record keeper said it wasn't taken during the assault by the Titans. Mnemosyne must know that the item in the vault is something that can enhance her powers," Jupiter stated.

Thalia frowned. She knew that there was a few pieces of material left over from the original nuclear accident, and she knew that her father had used some to enhance his power. Neptune and Pluto had done the same. The remaining piece was locked in a briefcase and into a vault, and even further security measures where taken when Pluto was sent to Tartarus.

Thalia wanted to ask her father if he had checked the vault to make sure that the material was still there, but she knew it would only get her into more trouble. Her father trusted the record keeper, an old, decrepit woman named Gaea to make sure that everything was in order.

Without saying another word, Jupiter left. Thalia slowly sat back at the table. Her ID card had somehow been stolen right from underneath her nose, and now, an item of immeasurable power was in the hands of a Titan. The camera would capture Mnemosyne breaking into the vault though, and it wasn't like she could open the briefcase anyway. Thalia closed her eyes and tried to calm down. She knew things would work out, but she also had a sick feeling in her gut, like things were going to go very wrong very quickly.