Disclaimer-I don't own this awesome show!

This is my first Hawaii Five-0 fic. I have plans for this to be around 10-15 chapters. I hope you enjoy it!

It had been a long day for the Five-0 team. They had just closed a case of husband and wife serial killers. And, of course, there was a problem. The husband and wife had two daughters, and now that they would be in prison for the rest of their lives, the daughters had nowhere to go.

Since it was already after ten o'clock and everyone else had gone home, Steve had to handle the situation.

Twelve-year-old Serenity sat beside her sister, seven-year-old Willow. Steve sat across from them.

"It's late, and you two both need sleep, so I'm gonna take you to my house," Steve announced.

Serenity looked surprised. "What?"

"You two need a place to stay, and there are extra rooms in my house. Come on, your sister's already falling asleep."

Serenity nodded. "Okay." She stood up and looked at her sister, unsure of what to do.

"I got her," Steve said, lifting the half-asleep girl. He lead the way to his truck and gently placed Willow in the back seat, carefully putting the seat buckle around her. Then he looked at Serenity. "Come on."

"I can sit in the front," she argued. "I'm not a little kid."

Steve smiled. "Never said you were."

Serenity sat in the passenger's seat as Steve drove underneath a dark sky.

Awkwardly, Steve attempted to make conversation with Serenity. "How's school?"

"Boring."

"What's your favorite subject?"

"Science."

What was it with the one word answers? But Steve had to admit he had no idea how to talk to kids.

"We're home," Steve announced, getting out of the truck. Serenity followed him.

"She's still sleeping," Steve remarked, lifting Willow into his arms.

Serenity silently followed Steve into the house. There was a woman sitting on the couch watching TV.

The woman looked up and smiled. "Aw, Steve, you look so cute holding a little girl!"

"Mary, go to bed."

"Hey, just because I'm your little sister doesn't mean you can tell me what to do."

"Just go."

Mary sighed. "Fine."

"Wait!"

"What?"

"Do you have anything for the girls to sleep in?" Steve asked.

Mary smiled. "Of course! Let's go to my room."

Steve and Serenity followed Mary down to her room. Then the doorbell rang.

"Good, go get the door. I'm sure-what's your name, sweetie?"

"Serenity."

"I'm sure Serenity doesn't want you in here while she's changing."

Steve nodded, placing Willow on Mary's bed. He walked out of the room to answer the door, thinking, Who the hell is here this late?

When he opened the door, Steve was in for a shock. A brunette woman wearing a blue dress stood in the doorway, smiling.

"Hey. My sister's birthday party just ended," she said.

"Holy shit, Cath, it should be illegal to look as hot as you do right now."

Catherine smiled and looked down. Being in the navy, she didn't typically have the chance to be girly and receive compliments.

"You can come in but..."

"Oh. You have another girl over," Catherine said, her smile fading.

"No, no, no!" Steve exclaimed. "It's complicated. I want you to spend the night and you can, but just nothing...beyond that. Two little girls from a case my team is working on are here. They're with my sister right now."

"If you have little girls in the house, I don't think I should stay. But they're from a case? Oh, no, what happened?"

"Their parents were serial killers. They're sentenced to prison for the rest of their lives. The girls had nowhere to go so they ended up here."

"Aw, Steve, that's so sweet!" Catherine said. "I knew you were a softy inside."

Steve shook his head. "Here, come in. You can meet them."

He closed the door after Catherine came in.

"So who am I?"

"What do you mean?" Steve asked.

"What are you going to tell the girls?"

"I'll tell them you're my girlfriend, aren't you?"

Catherine giggled inside, but kept a strong outside. "Yeah."

Just as they were approaching Mary's room, Mary came out with Serenity and a now awake Willow.

"Willow, Serenity, this is my girlfriend Catherine," Steve introduced.

"Hi, girls," Catherine said, smiling.

"Hi. I'm Serenity," the older sister replied timidly. There was a new person here, and whenever there was a new person working for her parents, it was always bad news. "This is my sister Willow."

Willow was half-asleep again. She gave a little wave before leaning against Serenity.

"Alright, I think it's time for you two to get some sleep," Steve declared. "Serenity, there's a spare bedroom right next to Mary's room. I'll be there in a minute. I'm gonna take Willow into another spare bedroom."

Mary led Serenity to what Steve called a spare bedroom. It was actually his old bedroom. Now he used the master bedroom.

"Goodnight, Steve," Catherine said before heading out.

"Goodnight, Cath. Come over tomorrow morning."

She nodded before leaving.

Steve carried Willow into the spare bedroom. "If you need anything, Willow, just call me."

"Okay. Night," Willow muttered, leaning back on the pillow.

Steve smiled. "Night, honey."

Was this what it felt like to be responsible for kids? Steve now understood how Danny felt with Grace. It was as if there was an unspoken promise to keep the girls safe and protective them from anything.

He walked to his old room where he told Serenity to go. He was surprised to find her standing beside the bed. He had assumed she would be very tired.

"Steve?" Serenity called out.

"Serenity, what's wrong?" Steve questioned.

"I can't sleep alone," she explained. "I've seen my parents do terrible things. It gives me nightmares. I usually stay with Willow, but she's already asleep now."

Realizing the girl was near tears, Steve did the first thing that came to his mind. He wrapped her in a hug, rubbing her back as she cried.

"You can sleep with me, honey. Let's go."

Serenity continued to cry on the way to Steve's current bedroom. Steve tucked her into bed and laid down next to her, determined to do whatever he could to help both girls.

Thank you for reading and please review!