Disclaimer: I don't own anything except my OC.

Thanks for the reviews.

Daughter of Poseidon

.Percy's POV:

Where is she? How could you let something like this happen to you own sister. I think back to earlier when Mom came to visit me at camp. I thought she was just missing me but when she saw me, started to cry. By the state of her makeup at the time I could tell she was barely keeping it together. I rushed over to reassure her, but stopped when I noticed that Claire wasn't to be found.

"Mom, where's Claire?" I asked. Claire would never miss a chance to come and check out the camp, but hurt flashed through her eyes and I knew that something had happened.

"I don't know where she is, Perc. She didn't come home after school, I thought she went to a friends house but when she didn't come home for supper I knew that something was wrong." She explained as calm as she could.I felt as if the world had come crashing down around me, when she finished that sentence. In a blink of an eye I was back in my cabin, packing to go out looking for her. There was a soft knock on the door as I was throwing a couple of my shirts into a bag, that already contained a bar of ambrosia, a bottle of nectar, and a small first aid kit.

"Hey, What happened?" A familiar blonde asked standing in the door.

"Nothing. I'm just going back home for a while." I tried to lie. She saw through me like usual and was clearly mad.

"What are you really doing, you know as well as I do that this is the safest place for you. Sally does to, so why are you lying to me?" Annabeth pressed.

"Claire, she's missing. I have to find her. It's my fault if I hadn't left her alone she wouldn't be gone." I explained exasperated. She left me in silence, only to return with a rucksack slung over her shoulder, and her dagger strapped to her hip. I stared at her for a second confused, she had definitely noticed and explained.

"Did you really think that I would let you go after her alone and without a plan?"She asked. "I'm going with you whether you like it or not. Besides did you really think that you wouldn't need backup. How exactly were you planning on sneaking out of camp anyway?"

"I wasn't going to sneak away I was going to walk away like everything was normal and just leave." I tried.

"Hey, I couldn't help but overhear. Where are you going?" Asked Jason who was hanging out here with Piper and Leo, who just happened to be right behind him.

"Percy's going to look for his sister." Annabeth explained to him.

"Whoa man, you had a sister and you didn't tell us. I thought we were friends." Leo butted in.

"Leo, really you are unbelievable, that was seriously the only detail that you got from that sentence." Piper asked. "DO you have any idea of who took her? Or where she might be?"

"No. Wait earlier you were saying that the monster attacks on the camp were increasing, you don't think…" I was afraid of the answer. If he had Claire, the longer she was gone the less likely we would find her alive.

"Let's hope not. I was going to check out the source of these attacks later but I think our best bet of finding Claire would be to check each of these locations." Annabeth explained.

"Oh her name is Claire, I bet she's pretty too." Leo started again.

"Leo, shut your girl crazy mouth and get your gear, we're going to help find Claire." Jason snapped.

"Fine, but I get dibs on her if she's hot." He said.

"Nobody gets dibs on her, she is my sister. Stay away from her." I snapped. If this kid think she gets to even talk to my sister in the way he talks to half the girls at camp he's wrong. Jason had dragged Leo out of my cabin and once again told him to grab his stuff. Within ten minutes everyone was back in my cabin. Annabeth had grabbed her map that had all the locations marked off. As we left the camp I noticed that my mother was already gone, and nobody questioned us.

Once through the barrier, we call a regular taxi from a beach phone, since the first location was close enough it wasn't worth calling the Grey sisters. After paying the cabbie we drew our weapons, prepared for anything, and kicked in the door. Instantly our nostrils were filled with noxious fumes, and as we looked into the darkness, the room was full of monsters. They were shocked by our arrival that they were easy pickings, using the light to our advantage, blinding the demons, then we made quick work of them.

Next was the hallway, it was empty besides a solitary guard that blocked a door. It was a cyclops, and we had the advantage when he decided to turn his back to us, he was turned just long enough to get close for hand to hand combat. Again in that area he was lacking, I easily dispatched him, sending him to tartarus. As he dissipated a single key fell to the ground when his body previously was. Annabeth examined the key and placed in the door after I had tried to pull the door open. None of us were prepared for what lay on the other side of that door