"I found it."

Three little words from Gloria sent Stefan and Sirena into a swirling hurricane of panic and worry. The two shared a look of dismay while Klaus and Rebekah were elated at the fact the witch had caught a glimpse of the necklace.

"So where is it?" Rebekah asked impatiently.

Gloria shook her head. "It doesn't work like that, doll. I get images— there's a girl with her friends…"

"Yes, a dead girl with dead friends if I don't get my necklace back," Rebekah nodded furiously.

"Okay, well I'll have to dive back in to get the details."

"So dive," Klaus smiled, approaching them and leaning down towards Gloria.

"I need more time… and space. You're harshin' my juju."

"We can wait."

"I'm sure you can, but that's not what I asked."

Not wanting things to get worse, Sirena jerked a head towards Klaus, signaling for Stefan to jump in.

Catching the hint, Stefan slapped a hand down onto Klaus' shoulder. "Hey… Hey, why don't we just come back later? I'm hungry anyway." Leaning closer, Stefan spoke into Klaus' ear. "I'll let you pick who we eat."

Not exactly what Sirena was hoping for but whatever. During their travels Sirena had only fed when she absolutely needed to since there were no blood bags hanging around Klaus. With a nod from Klaus, the four vampires left the bar after some dinner and it wasn't long before the others had compelled themselves some young ladies to feast on.

Sirena sat off towards a corner of the storage area, knees pulled up into her chest while she waited for the others to finish. She was absolutely starving, but she would rather starve than take a poor girl's life. Her head hung between her knees as she tried to fight the urge to give in.

"My girl's dead. I'm bored," Rebekah pouted next to the lifeless blonde at her side.

Ignoring her, Klaus looked up from his dinner to Stefan. "You were right about being hungry."

"It's been a long day."

"Try being related to her." Klaus motioned towards his little sister.

"You're being mean," she whined, making Stefan laugh. "And why are you being mean? You used to love me."

"It's been ninety years, Rebekah. Give him a minute," Klaus defended.

"Why are you taking his side?"

"Because, dear sister, I feel pity for any man who doesn't give you what you want."

"Will you stop making me out to be a brat?! I am not a brat!"

"A thousand years of life experience says otherwise," Klaus teased.

Stefan laughed again only this time turning the fun around on Klaus. "Oh, you're no picnic either. I mean, I've only spent one summer with you and I feel like I want to blow my head off."

Sirena was surprised that Klaus actually laughed along with his sister, who eyed him flirtatiously saying, "Fantastic."

Stefan dropped his food down onto the floor with a thud and got to his feet, wiping the leftover blood from his mouth. "I need to go."

"Where's he going?" Rebekah asked her brother.

"To write a name on a wall. It's a long story." Klaus was about to bite back down into the girl laying limp in his lap, but his attention was caught by the young vampire sitting alone in the corner.

Sirena sat taking deep breaths, trying her best to keep control of her hunger and to keep thinking about things other than the intoxicating smell of the blood in the room. Her parents. Alaric. Mark. Caroline… A hand brushed past the hair hanging down around her head to gently lift her chin. Her eyes instantly found themselves looking into Klaus' as he knelt before her, watching the veins dance under her eyes.

His eyes searched her face. "You should eat something."

"I'm not hungry," she lied.

"You see, I know that isn't true. Your eyes betray you, my dear."

Biting her cheek, she looked away from him.

"It's been days since you've eaten." Standing up, Klaus held a hand down to her. "Come on."

Her eyes shot up to his. "I don't want to feed on those girls."

"Calm down. We're going out into the city."

Hesitantly, she let him lift her to her feet and begin to lead her from the building. Looking back over his shoulder he saw Rebekah begin to follow them. "Stay here, little sister."

"And what am I supposed to do?"

"Just wait for your dear Stefan to return. He'll need some company."

After leaving the storage building, Klaus had led Sirena back downtown. It was as if it was a completely different place when the sun went down. There were lights everywhere you looked and in the most brilliant of colors. It was just as Klaus had said… Chicago was magical. The wind whipped her hair around, making her wish she had brought a hair tie, but she did her best to twist it around and hold it to one side with her hand as they walked down the street into the heart of the city.

"So I'm curious as to why you would rather starve yourself than indulge in one of the locals…"

Sirena looked over at him as if it was obvious. "I don't want to take human life."

"I realize that, but you could simply just eat and erase. No need for killing."

Sirena bit her lip, knowing the reason.

"Do tell."

Turning her face away from him, she shook her head. "I guess I'm just— I'm afraid I won't be able to stop."

"Neglecting your nature isn't natural. Look at Stefan…" Klaus held a door open for her and the two stepped into a small bar that was absolutely packed full of people. They took a seat at the bar and Sirena turned to him.

"I would just rather stick to the bag. Damon taught me to control the urges, but I haven't had a blood bag in awhile so…" she said, almost as if she was turning it around on Klaus.

"Well, there's your first mistake. You let Damon teach you." Klaus' eyes rolled in his head.

Sirena let her lips turn up into a small smile. "He wasn't that bad. Both of the Salvatore's have been so nice to me since I was turned."

"And where was Mr. Callahan during all of this. He is the one who created you, correct? He should've been the one to teach you."

"I didn't even know who he was for the longest time."

"Well," he started, waving a bartender over. "Let me show you a new little way to get what you need while refraining from taking a life."

A tiny blonde stepped up to them from behind the counter, smiling as she awaited their order.

"Hello…" Klaus looked down to the girl's name tag. "Kate." He leaned forward onto the bar. "My lovely friend here is thirsty. Can you please make a cut in your wrist and fill her up a glass of your blood without anyone seeing you? And don't forget to bandage yourself up."

"Sure thing," the girl smiled brightly before disappearing.

"Klaus!"

"Easy, love. This is your alternative. A healthy way of living. Blood bags are no way for a vampire to live."

It was mere moments later that the girl returned with a glass nearly full to the brim of the liquid Sirena had been longing for. Taking the glass in her hands, it was warm to the touch from the blood, making it hard for Sirena to keep herself from getting all veiny. She took a small sip, but then began to chug it down before looking to Klaus, her eyes begging for more.

"We'll get you some more in due time. I've got somewhere I want to take you." Wiping a drop of blood from her chin, Klaus took the glass from her and set it down onto the counter. Wrapping an arm around her shoulders, he smiled down at her triumphantly as they headed back out to the street.

Walking down the crowded street, all Sirena could think about was getting more blood and everywhere she looked there was a source. Pulling her jacket tight around herself, she fought the urge.

"Think about something else," Klaus said, leaning down to her ear as they walked along. "Aren't you in the slightest bit curious as to where I'm taking you?"

Shaking away the thoughts of blood, she realized she did want to know. The blood had just been pushing that back further into her mind.

"Where are you taking me then?"

"Don't you like surprises?"

"It depends. So far I haven't much cared for your surprises."

"Fair enough," he smiled, looking down to his feet. "However, I do believe you'll enjoy this one."

Soon they had arrived at the doors of their destination. "The Sears Tower!?" she exclaimed.

"No one should come to Chicago and not visit the Sears Tower at least once."

Smiling, she was actually excited. Klaus had compelled a guard to allow them to be alone to enjoy their visit to the top of the building. As soon as she stepped from the elevator, the sight before her took Sirena's breath away. Rushing forward, she put her hand to the glass. The entire city was below them, a sea of twinkling lights. "Oh, it's absolutely beautiful!"

"You like it?" Klaus asked from behind her, arms crossed.

Spinning around, she couldn't help but smile from ear to ear. "Are you kidding?! This is amazing!" Turning back around, she continued to take in the view. "It's breathtaking."

Klaus smirked as he watched her move around the Skydeck, enjoying every angle of the view of the city. Seeing that she had found the Ledge, an area where you could walk out onto glass, he joined her. "Well, go on. Aren't you going to try it?"

Sirena let out a nervous laugh. "I don't know. Don't get me wrong… I love roller coasters and stuff like that, but this is a whole new level."

"You're a vampire. No need to be afraid."

Not wanting to seem like a wimp, Sirena took a breath and stepped forward onto the glass ledge. Sirena's heart skipped a beat as she stared down at the city raging below her. Klaus joined her and before she realized what she was doing her hand flew out, grabbing onto his arm as if it would keep her from falling. Instantly dropping it back down to her side, she looked away embarrassed.

"Sorry."

"No harm done," he smirked to himself.

Sirena swallowed hard, realizing how close they were standing. After all, The Ledge was a rather small space. There was just enough room for two people…

"You see that building there?" Klaus pointed down.

"Which one?" Sirena couldn't quite make out which one he was pointing to but he moved her to stand in front of him.

"There."

Sirena nodded. His breath was hot on her neck, making her body ache to be touched. Honestly, it didn't matter who it was, but everything with Damon had her all mixed up and needing affection. That was why she was starting to feel these confusing feelings for Klaus… at least that's what she was telling herself.

"That's Gloria's, our next stop. We need to check up on how she's doing on locating the necklace."

Thinking over everything they had done over the past few months, Sirena cautiously asked, "What if there isn't a way to help your hybrids?" Quickly, she turned her head back to look up into his face. "I just mean… what if you were never meant to be able to create more hybrids?"

Klaus' face grew serious as he thought it over. "I have to be able to create more."

Sirena studied the look on his face. What was it that she saw there? "Are you afraid of being the only one? Of being alone?"

Stepping back away from her, Klaus said, "I'm not afraid of anything." He stomped off towards the elevator, leaving her staring after him. "Tour's over."

Klaus burst into the storage area with Sirena close behind him, interrupting what appeared to be an intense conversation between Stefan and Rebekah. "Gloria's gone. She's cleared out. We need to find a new witch immediately."

Sirena took in the expressions on Rebekah and Stefan's face, but it was Klaus who asked, "What's going on?"

"Something's wrong. He was asking about Mikael," Rebekah answered. "He's not with us, Nik. I can sense it."

"She's wrong. Klaus…" Stefan began his defense, but it didn't matter. One snap later and Stefan was falling to the floor, dead. Sirena's gasped and Rebekah narrowed her eyes on her.

"You! I thought you were going to be a nice new friend to me, but no—"

Everything went black.

Sirena woke gasping for air and her eyes flying around, searching her surroundings only to find Stefan lying next to her with a crowbar jutting out from his abdomen.

Falling to her knees at his side, Sirena wraps her hands around the cool metal of the crowbar, yanking it out. "Stefan! Stefan, wake up!"

Coming to, Stefan let out a groan of pain. "Damn, Rebekah!" he growled.

"She did this to you?"

"I woke up. Klaus was here. He said he was searching for what I was holding onto." Stefan paused, eyes dropping to the floor and breathing heavy. His eyes raised to Sirena's face and she knew something was wrong. "He found her, Sirena. He found Elena."

"Oh, my god," she breathed. "Where are they?"

Sirena had ended up at the high school and was now roaming the halls for signs of either Elena or Klaus. How she ended up trying to save Elena's life, she'll never know… Of course, she knew she was doing it for Stefan, but helping Elena out was the last thing on her mind and hated the fact that that's exactly what she was doing. With her vampire hearing, Sirena could hear Tyler's voice emanating from down the hall and at the sound of it, Caroline was in trouble. Flashing down the hallway, Sirena found Caroline trying her best to fight off Rebekah.

"Let her go!" Sirena yelled, drawing Rebekah's attention.

"Well, well… look who decided to show. Stefan enjoying himself?" Rebekah smirked, twisting Caroline around so that she had her in a choke hold.

"Sirena?" Caroline stared at the black haired vampire in shock.

"Caroline, is it?" Rebekah asked. "Sorry, but I'm only in need of your boyfriend." With a twist, Rebekah broke Caroline's neck.

"Caroline!" Tyler lunged forward, but Rebekah caught his arm. "What the hell do you want?"

"It's not what I want, dearie. Now come along. You too, Sirena."

Sirena followed behind Rebekah as she dragged Tyler at her side. Thrusting the gymnasium doors open the four stepped inside.

"Get off of me!" Tyler yelled.

"Hush now," Rebekah commanded.

Sirena saw that Elena, Bonnie, Matt and two other high school students accompanied the room with Klaus. Trying her best not to look at Elena, Sirena's eyes darted around the room, finally landing on Klaus.

"I'd like you all to meet my sister, Rebekah. Word of warning she can be quite mean," he smiled.

"Don't be an ass." Rebekah shoved Tyler over to Klaus.

"Leave him alone," Elena ordered.

"I'm going to make this very simple," Klaus yelled, jerking Tyler to stand in front of everyone with him. "Every time I try to turn a werewolf into a vampire hybrid they die during the transition. It's quite horrible actually. You can ask Sirena. Nasty business, isn't it, dear?" Sirena glared over at him as he bit down onto his wrist and made Tyler drink. Everyone save for Rebekah watched in shock. "I need you to find a way to save my hybrids, Bonnie. And for Tyler's sake… you better hurry." Klaus snapped Tyler's neck, making Elena, Bonnie, and Matt gasp out in horror. Smiling, Klaus headed over to sit on the bleachers with his sister at his side, watching as the others surrounded their friend.

"He killed him," Matt shook his head in grief.

"He's not dead. Klaus' blood will turn him into a vampire," Elena corrected.

"But it's only a matter of time," Sirena interjected. "Klaus is right, I've seen it. You don't want this for Tyler."

"And if Bonnie's successful," Klaus jumped down from the bleachers and proceeded to cross the gym towards them. "He'll survive his transition. Go on then. Go and fetch your grimoires, enchantments and whatnot. I'll hold onto Elena. For safe keeping." Klaus wrapped a hand around Elena's arm, but still Bonnie looked as if she didn't want to leave. Rebekah stepped up behind Elena, looking as if she was ready to rip her throat out.

Knowing Bonnie didn't stand a chance against the two of them, with a reassuring nod Sirena said, "Bonnie, go. Hurry." Bonnie nodded and she took off out of the gymnasium with Matt. The door slammed shut behind them.

Rebekah spoke up from behind Elena, making her jump. "So this is the latest doppelganger… The original one was much prettier."

"Enough, Rebekah. Take the wolf boy elsewhere, would you?"

Rebekah flashed a smile at Elena before dragging Tyler out of the gym by his arm.

Klaus pulled Elena closer. "Just ignore her. Petty little thing…Now why don't you sit tight while we wait for your little witch friend to find our solution." Klaus returned to his spot on the bleachers. Sirena looked from where Elena knelt next to her two fellow high school students to where Klaus sat leaning forward onto his knees. Choosing the lesser of two evils, Sirena headed over to stand in front of him. "These are innocent people, Klaus."

His eyes were full of amusement as they met hers. "I would think you of all people would think of Elena as anything but innocent."

Sirena stood thrown off by his statement. "What do you—"

"I've lived a long time Sirena. I know jealousy when I see it. My guess would be that whatever Mr. Salvatore did to you involved dear Elena."

Sirena grimaced and looked away from him and he knew he was right. "That doesn't mean I think she should die. And the others didn't do anything."

"I'll do whatever I have to in order to get what I want. That's something you'd do right to remember." His eyes darkened and Sirena couldn't believe she had thought there was more to him than what everyone saw.

The side door to the gym creaked open and Stefan stepped inside. "Stefan." Elena rose to meet her boyfriend, but it wasn't her he greeted first.

"Klaus."

"Have you come to save your damsel, mate?"

"I came to ask for forgiveness and pledge my loyalty."

"Well, you've broke that pledge once already."

"Elena means nothing to me anymore," Stefan raised his voice so Elena could hear, but lowered it again for Klaus. "Whatever you ask of me, I will do. You have my word."

"Stefan? What are you—"

Klaus cut Sirena off. "Fair enough." Jumping down, he waltzed towards the high schoolers. "Let's drink on it. Kill them." He gestured towards the two on the floor, making them jump up in fear.

Stefan didn't move.

"What're you waiting for?"

"What, no.. Stefan, no," Elena started. "He's not going to hurt me. He already said—"

Klaus whipped his hand around, slapping Elena so hard she whirled through the air before landing hard on the gym floor. Stefan growled and charged Klaus, but it was Klaus who got the upper hand, grabbing Stefan by the neck. Sirena dashed over, stopping behind Stefan.

"She means nothing to you? Your lies just keep piling up."

"Let her go," Stefan growled. "I'll do whatever you want. You have my word."

"Your word doesn't mean much. Now I've lived by your word all summer, during which time I've never had to resort to this. Stop fighting," Klaus compelled.

"Don't do this," Stefan begged.

"I didn't want to. All I wanted was your allegiance. Now I'm going to have to take it."

"Don't, don't…"

"You'll do exactly as I say, when I say it. You will not run. You will not hide. You will simply…just…obey." Klaus released Stefan, but Stefan didn't even try to move; He just remained there frozen.

"Stefan, no…" Sirena's eyes bounced back and forth between Stefan and Klaus.

"Now kill them…Ripper."

Stefan's eyes turned a deep shade of red as the veins erupted underneath them. In a flash, he was biting down onto the girl's neck, her screams echoing off of the gymnasium walls. Sirena turned away as Stefan dropped the girl to the floor and stalked after the boy. She wanted nothing more than to run from the room.

"What's the matter, love? Something bothering you?" Klaus asked sarcastically.

Sirena spun on him. "You know damn well something is bothering me."

Klaus' face grew stony. "Don't forget, Sirena, I am not one you want to cross."

"Then kill me, Klaus. What's keeping you from doing it?" she challenged and his face softened ever so slightly.

The door burst open behind her, slamming back against the wall as Rebekah entered. "Where is it? Where is my necklace?"

"What are you going on about?"

"She has my necklace. Look," Rebekah answered as she handed the phone in her hand to Klaus.

Klaus' gaze fell on Stefan. "Well, well… more lies."

Both originals stood in front of Elena, staring at her accusingly. "Where is it?" Rebekah repeated.

"I don't have it."

"You're lying!" Rebekah lunged at Elena, biting down hard on her neck. Elena screamed and Stefan started towards them, but it was Klaus who yanked his sister away from Elena.

"Knock it off!"

Through teary eyes, Rebekah yelled, "Make her tell me where it is, Nik!"

Klaus sighed and brought his hands up to his mouth. Taking a breath, he knelt to Elena's level as she attempted to scoot away. "Where's the necklace, sweetheart? Be honest."

"I'm telling the truth. Katherine stole it."

"Katerina. Of course…" Klaus clapped his hands together. "Welp, that's unfortunate. If we had the necklace it would've made things a whole lot easier for your witch, but since we're doing this the hard way, let's put a clock on it, shall we?" Klaus crossed the gym to the scorekeeper's table. The scoreboard clicked to life, twenty minutes on the clock. Stalking back towards Stefan, Klaus said, "Twenty minutes. If Bonnie hasn't found a solution by then I want you to feed again only this time I want you to feed on Elena. You know you want to."

"Klaus…Don't do this to him!" Elena begged.

"Nobody leaves. If she tries to leave, fracture her spine," Klaus pointed down to Elena as he stalked out of the room with Rebekah.

"Sirena," Elena called. "You have to follow after him. Make sure he doesn't hurt anyone else."

"What about Stefan?" Sirena stared at her, shocked.

"I can handle it."

Sirena raised an eyebrow at her. "I can help!"

"I've got this!"

Shaking her head out of annoyance, Sirena left the gym, casting one last look back at Stefan. Sirena found Klaus leaning back against the lockers, alone. Her eyes scanned the area for a sign of the blonde original, but there was none.

"Are you following me now, Sirena?"

Ignoring him, Sirena asked, "Where'd Rebekah go?"

"She went to babysit the little blonde vampire and Tyler. He should be waking up soon." Pushing away from the lockers, Klaus stopped in front of her. His gaze nearly making her want to turn and run. "You may intrigue me, Sirena, but nothing can come between me and my hybrids. If you get in my way, I will kill you."

He started to walk down the hall away from her, but stopped when she said, "I intrigue you?"

He turned and his eyes connected with hers.

"I think you're lying. I don't think you'll kill me. You could've let your hybrids kill me back at that werewolf camp, but you didn't. I wouldn't have been your problem anymore."

"Is that what you think? That you're my problem?"

Sirena swallowed hard as Klaus stepped closer and closer to her, making her back up into the lockers behind her, trapped. "I'm a mystery, one you can't solve right now and I think that's what intrigues you. I don't think you'll kill me until you figure it out."

His face was mere inches from hers and he said, "I keep you around because I enjoy your company. Don't let that change."

Bonnie and Matt could be heard coming down the hallway towards them. Klaus backed away from Sirena slowly, not breaking eye contact.

"…Hybrids can't transition because Elena's still alive," Matt stated.

"…Tyler," Bonnie said, her voice full of a sad realization.

"He's going to die, isn't he?"

"I wouldn't be too sure about that," Klaus interrupted them, leaning against a door with his arms crossed. "Given the choice, doppelganger or hybrid, I'd go hybrid every time."

"But what—"

Klaus ignored Bonnie. "You and boy wonder go to Tyler. Sirena and I are going to go fetch our doppelganger."

Bonnie and Matt didn't waste any time. They pushed past Sirena and Klaus and went to be with their friend. Sirena did her best to keep up with Klaus as he scoured the halls. "You're just going to kill her?"

"Not exactly," Klaus smirked. Sure enough, Elena burst through one of the glass doors, running straight into Klaus. "We've got to stop meeting like this."

Dragging Elena along, Klaus led them to the cafeteria where they found Stefan driving a broom handle into his stomach.

Sirena stared at him with disgust. "Stefan!"

"Now this is fascinating. I've never seen this before. The only thing stronger than your craving for blood is your love for this one girl. Why don't you turn it off?"

Stefan had sweat glistening on his forehead from the pain. "No!"

"Come on. Your humanity is killing you! All the guilt must be exhausting. Turn it off."

"No!"

"Stefan…" Elena shook her head.

"You're strong, but you're not that strong." Klaus yanked the broom handle from Stefan's body. "Turn. It. Off."

Stefan glared at him before doing something none of them expected. Shoving Klaus backward, he screamed, "No!" Klaus slammed him back against the wall.

"Klaus, don't!" Sirena shouted.

"Turn it off!" he screamed in Stefan's face and in that instant Stefan was defeated.

"What did you do?" Elena whispered.

Klaus turned to face her. "I fixed him."

"You call this fixed?" Sirena yelled at him.

"This is his true self, Sirena. One day you'll understand. Until then… I think a test is in order, don't you?" Going to Elena's side he stood behind her with his hands on her shoulders. "Ripper, perhaps you'd like a drink from the doppelganger's neck." Klaus moved Elena's hair to the side and left her there alone as Stefan's demeanor changed to that of the killer inside.

Sirena saw Stefan start to move toward Elena and as he dashed forward she tried to flash in front of him to stop him, but two arms wrapped around her waist. Klaus held her to him as she watched over his shoulder as Stefan drank from his girlfriend. "Stefan, stop!"

"I told you, love… This is Stefan's true nature. Not even his love could stop it."