A/N: So, Star Trek is not new to me, but this is my first crack at a fic in the new movie fandom. The idea for this came to me while I was watching the film for the third time (it was kind of hard to swallow the first time around). I have a lot of ideas for it and I hope you enjoy it. Comments, reviews, and suggestions are always appreciated.

"Vee haf cleared space dock, Sir."

"Engine room reports ready for warp, Sir."

"Set a course for Midian III and engage at warp five, Mr. Sulu," James Kirk replied.

"Course laid in."

"Engage."

"Uh…Captain?"

Jim whirled around in his chair to look at Lt. Uhura. "Something wrong?" he asked.

She sighed and replied, "I know we've gone to warp, but I just received a communiqué from the space station. Apparently, we left a crewman behind: Crewman Rodriguez."

"Who is…?"

"Security detail, Sir," Commander Spock supplied.

"How did we manage to leave Mr. Rodriguez behind?"

Uhura focused on the screen in front of her and said, "Well, Rodriguez was guarding the cargo bay entrance during the loading of supplies and apparently a young woman exposed herself to him and then proceeded to incapacitate him. He's in the station's infirmary."

"Do we need to go back for him, Captain?" Sulu asked.

"Nope," he answered, hopping out of his chair, "but we do need to find the intruder on our ship. Spock, Uhura, you're with me. Mr. Sulu, you have the conn."

When they were all three inside the turbolift, Uhura asked, "Why do you need me?"

"You're a girl."

"I'm a what?"

"Fine, you're a woman."

"I do not understand how that is important at this moment."

"Our intruder is a woman," Jim began, "She might feel less threatened if Uhura approaches her."

Spock quirked an eyebrow in surprise. "That is a logical conclusion."

"How do you even know we have an intruder on board?"

"It is a logical assumption given the information you relayed from the space station."

"See?" Jim asked sarcastically. "Even he gets it."

The turbolift doors slid open and Jim commed the bridge. "We've arrived on deck nine, Mr. Sulu. No one else in or out until I say so."

"Aye, Sir."

Jim quickly stepped out and opened the weapons locker. He handed a phaser to each of them and said, "Leave 'em on stun and split up. She's gotta be around here somewhere."

Uhura rolled her eyes as she walked in the opposite direction from the two men. She rounded one corner before finding a crewman just getting up from the ground.

"She went that way," he groaned.

Uhura followed his directions with her phaser raised. Down the corridor she saw a human girl of about eighteen with dirty blonde hair wearing faded jeans, boots, and a beat-up leather jacket that was obviously too big for her. She whirled around and pointed her phaser at Uhura as soon as the older woman's footfalls sounded against the floor.

"Whoa, whoa, it's okay," Uhura told her. "You can put that down."

"Yeah, you first," she replied snidely.

"So, are you sightseeing or what?" Uhura asked, edging closer to her.

"I need to talk to your captain."

"Your subspace communicator not working?"

"He wasn't answering my messages."

"What's so important you felt the need to attack Starfleet officers and stowaway on his ship?" Uhura asked, her phaser still raised.

"It's personal," the girl growled back.

Jim appeared from the other corridor just over the girl's right shoulder. His face immediately scrunched up in confusion. "Mariella?"

She turned at the sound of his voice. "James Tiberius Kirk. You fucking rat-bastard!" She pointed her phaser at him and Spock stepped out from the other side of the corridor and laid his hand on her neck. She immediately crumpled onto the floor. Jim continued to stare at her wide-eyed and open-mouthed.

Uhura shook her head in disgust. "You son of a bitch!" she shouted as she got in her captain's face. "This girl's only eighteen. What the hell did you do to her?"

"Nyota," Spock admonished under his breath.

Jim's eyes flared in anger. "You don't know a single thing about me and you never have," he answered loudly. "This girl is only seventeen, and she's my sister."

It was Uhura's turn to look stunned as she watched her captain kneel down and scoop the unconscious girl into his arms.

"Tell Bones I'm on my way to sickbay," he said before stalking off toward the turbolift.

"I, uh, I didn't…" Uhura tried to begin.

"Report back to your station, Lieutenant," Spock told her quietly.

"Yes, Sir."

"How long do you think she'll be out?"

"Hard to say, Jim," Leonard "Bones" McCoy answered. "Vulcan nerve pinches aren't very precise on sedation time. I could give her a stimulant. Wake her up."

"No, let her sleep," he answered, brushing hairs from her forehead.

"I didn't know you had a sister," Bones said, the question evident in his tone.

"Half-sister," he explained shortly, "and my family is not my favorite topic of conversation."

"Understandable," Bones said, bringing up some readings on her bedside console. "She's malnourished and somebody's been usin' this girl as a punching bag for most of her life. It's gotten worse in the last few years too."

"Not all humanity is as enlightened as we'd like to think, Bones," Jim told him quietly. "I should probably be here when she wakes up."

"It'd be a good idea."

"Tell Spock the conn is his until then."

"Will do."

"So, the intruder was actually the captain's sister?" Sulu asked in disbelief over lunch.

"Yeah, but she must be a half-sister or something," Uhura answered. "I thought she was an angry ex-girlfriend at first and that kind of freaked me out because she's so young."

"Vy vould dyou tink she vas a girlfriend of zee keptin's?" Chekov asked between bites.

Sulu covered a grin with his hand. Uhura took a deep breath and said, "Well, you see, the captain is…"

"Lieutenant Uhura, may I have a word in private please?"

She looked up at Spock and followed him to the corner of the mess hall.

"Something wrong, Commander?" she asked innocently.

"As a senior officer, you should not be engaging in idle gossip with your fellow crew members," he told her flatly.

"I was not gossiping," she answered defensively. "They asked me what happened with the intruder and I told them."

"Lieutenant, you know as well as I do that it is not necessary to reveal the intruder's personal relationship to the captain."

"Her personal relationship to the captain is the only reason she's on board," Uhura hissed back. "And it's obviously keeping him from doing his job. He hasn't been on the bridge all morning."

"That is not for you to judge," Spock told her shortly. "Lieutenant, please follow my instructions in this matter and in the future. Understood?"

"Understood, Sir," she answered snidely before turning on her heel and marching out of the mess hall.

"As you were," Spock said in response to all the staring faces.

"I hate green beans."

"I hate Brussels sprouts. That didn't stop Mom from cramming them down my throat," Jim answered, smiling.

She groaned as her eyes fluttered open. She looked around and then attempted to sit up.

"Take it easy," Jim told her, gently pushing her back in the bed. "You're muttering about vegetables. Somehow, I don't think you're at a hundred percent."

She glared at him, but laid back in the bed. "What happened?" she asked.

"Well, you pointed a gun at me, so my first officer did this Vulcan neck thing he does and you collapsed like a sack of potatoes," he told her.

"That explains why my neck hurts," she said, rubbing her neck and shoulder.

He tucked a stray hair behind her ear and said, "You're starting to look a lot like Mom. What're you doing here, baby girl?"

Her eyes filled with tears. "Isaac's been gone for a year. Dad is…"

"An asshole," Jim finished for her. "That's not really shocking."

"He has Merkerson's."

"Oh. So, a neurological disease excuses a man for abusing his own daughter?"

"He hasn't—"

"Bullshit!"

"Hey, keep it down!"

The squabbling siblings looked up at the scowling form of Bones McCoy. "Some of us have work we need to do," he grumbled before turning back into his office.

"Well, he's a ray of sunshine," she muttered, folding her arms across her chest glumly.

Jim chuckled appreciatively. "That he is. He's also a good doctor. He said someone's been using you as a punching bag and that it's been getting worse for the last few years." He sat down on the end of the bed and continued, "All of your messages have been about finding Isaac. Why didn't you tell me Dickhead was getting worse?"

"Aren't you a little old to be calling your step-dad a dickhead?"

"Never too old to call a tiger by its stripes. Answer the question, Mariella."

"You're not going to come home, Jim!" she shouted. "I can't take care of Dad alone. You help me find Isaac, and I get some help with Dad."

"Isaac is a low-life and he wouldn't help you even if I did find him," Jim retorted. "Richard Chase does not deserve you as a daughter, Mariella. I can get you out of that house."

"He's my father!"

"He's a son of a bitch!"

"What part of 'keep it down' didn't translate for the two of you?"

Bones wasn't scowling. He had one eyebrow raised in what could almost have been called a snarl.

"Sorry, Bones, we're having a family disagreement," Jim explained.

"I don't care if you're having a goddamn family reunion, if you don't remain calm, I'm kicking your ass outta here."

When he was out of earshot, Mariella asked, "Did you find that crab under a rock?"

Jim chuckled appreciatively. "No, he sat next to me on the transport to the Academy," he told her quietly. "Mariella, what sent you running all the way here?"

Her face scrunched up in pain as tears flowed freely down her face. "Dad's dying and he just wants to see his son one last time," she choked out. "Isaac's disappeared, Jim."

"He does that, Mariella. He has ever since he was seventeen."

"Not like this," she argued. "He always sent me a message or token or a souvenir or something, but I haven't heard anything from him in almost a year."

"Well, he probably pissed off the wrong group of Naussicans."

"Aren't all Naussicans the wrong group?"

Jim grinned and said, "True, but whatever's happened to Isaac, I'm sure it's his own fault. He's gone, baby girl. You gotta accept that."

"He's your brother, Jim."

"No, he's your brother."

"And you're my brother, therefore—"

"Don't-don't try using logic on me," he told her. "I've developed an immunity over the last year."

Mariella rolled her eyes and laid her head back on her pillow. Staring at the ceiling, she said, "So, what happens to me now?"

"What do you mean?"

"Jim, I stowed away on your ship and assaulted several officers," she reminded him.

"Self-defense," he replied. "That's what I'll tell Starfleet anyway. I'm not going to let them send my baby sister to a penal colony."

She smiled for the first time since she'd been on board. "Thanks."

He cupped her face with one hand and brushed away a tear with his thumb. "I can't send you back to someone who's gonna hurt you, baby girl," he told her. "I'm gonna call some people at Starfleet Medical and get him in a hospital."

She shook her head and wrapped her fingers around his hand. "I can't live in the house by myself, Jim."

"There's a solution for that too," he told her, a playful note in his voice.

"What?" she asked incredulously.

He grinned and said, "You could join Starfleet and go to the Academy."

She cocked an eyebrow at him. "What? Are you recruiting now?"

"You're smarter than me, Mariella," he told her seriously. "And you're the best damn pilot I've ever known, just don't tell my helmsman."

She giggled and shook her head. "I'll think about it."

"That's all I ask," he answered. "Just have one more question."

"What?"

"Did you really flash that first guard before you knocked him out?"

She bit her lip and smiled sheepishly in response.

Jim laughed lightly and kissed her forehead. "Yeah, you're my sister."