If you're the kind of person who does chapter skips, you won't understand this story at all! So go back to the start and read! It's not that long. Actually, you can start from the chapter You're Perfect and it will still make sense.
"This is a special piece of metal, created by Toph Beifong. Once attached to different points of the human body it can detect their heart rate and reactions as well as multiple other things. Toph used to call it a Pants of Fire Liar Catcher. We tend to call it a Lie Detector these days since I don't think Toph's name for it was all that...professional," Lin explained as she watched Saihkan hook Narda up with the device.
The woman snarled,"Oh yeah! And what makes you think I'm going to answer?! My personal life is my personal life!"
"If you don't answer we can use force. Plus if you lie, the metal sends a shock to you. And not a gentle shock, a painful one," Lin responded.
"Torture!" spat the Narda, "You police officers torture me!"
Lin rolled her eyes, "Let's begin. Yes or no, your name is Narda and the man standing behind you is Hablan."
"Yes," Narda watched the machine carefully.
"True or false, you are sister of Yakone."
There was a silence. Lin nodded to Saihkan. He picked up a remote with three buttons and pressed the second of the three. Narda leapt up as she was shocked.
"YES YES! My blasted brother."
"And you are a blood-bender, no? Who possess the same skill as Yakone as well as all your immediate blood-line," Lin continued.
"YES YES! My stupid blood-line!"
"And there are currently people living under your house?"
"Yes," Narda got quiet all of a sudden. Lin felt that this topic was of the utmost importance.
"And those people are all your relatives," Lin said after carefully thinking.
"Yes."
Saihkan couldn't believe this all. Things just seemed to get more intricate as Lin went on. Now there was an entire family of blood-benders below them. This was a dangerous situation. Although they did have Narda and Hablan strapped down as well as sealing off the exits to the underground. No one was going down and no one was coming up!
"How many are there?"
"6 not including myself or Hablan. They were unrecorded so you probably didn't know about them."
"Are they the only other relatives besides Yakone, Tarrlok and Noatok that have the special blood-bending genes?"
"No."
Lin took down note of that. She was about to continue on that topic when another thought came to her head, "If your ex-husband wasn't a blood-bender, how come Tahno can blood-bend?"
"Idiot! Think about it. Tahno's mother was a blood-bender. Just not with the special genes that allowed her to blood-bend whenever."
"Do you have a family name?" Lin wanted to get as much information about the family themselves as possible.
"Yes, but we rarely use it. The Kaundi (pronounced Cown-die)branch. Tahno's side of the family was Faharu branch."
Lin took some more notes, "So did you brain-bend Tahno?"
"No." A shock of electicity was sent through wires. Narda screamed in pain, "YES YES. AARGH." The shock stopped and Narda's body became limp.
"Alright, back to earlier points. Whose the other blood-benders with the special genes that isn't under your roof?"
Narda closed her eyes, "Yhona and Jaidi."
"What does Yohnellica have to do with this whole event?"
"She was the one. The one who places the finger at the door. Once every second day it's happened now. She'll explode poisonous gas at our front and leave a finger of our dear Jaidi who she kidnapped and has held hostage."
"Why would she do that to you?" Saihkan asked. He was starting to get more and more confused.
"Because she doesn't agree with what we're doing. So she tortures Jaida. Just like she did to Goulo. First it's toes, then it's fingers and then it's bigger stuff. Hands, feet, noses, ears, even a leg. And then finally the head. We colleect them all."
"What are you doing?"
Silence. Minutes of silence. Saikan was about to hit the button again when Narda yelled, "WAIT! Okay. Noatak and us were an ally. Even Tarrlok knew what we were doing. We were avenging Yakone, my brother. We were avenging ourselves. Everyone in the Kaundi branch had their bending taken by the Avatar. Except Noatak who was missing. When we one day met him again in the equalist rally's he returned our bending to us, but only if we helped him with his mission to ereadicate all bending except our own noble branches. So we are striking to main point, the Avatar."
"I knew it!" Lin whispered, "Why Tahno though?"
"Isn't it obvious?" Narda scoffed, "Because Tahno is the closest blood-bender to the Avatar. I was hoping he'd draw her in and kill her. But instead he caught some dim witted White Lotus scum and that foul Mako teen."
"Yohnellica, why was she so against it?"
"Yohna is a fool! She believes the Avatar is what will some day make our branch second superior. That by being the only benders, we shall be hated. By doing such evil, no one shall follow us. The Avatar to her is an ally. But the Avatar is only here to stand in our way. To be second best is like playing a fool's game. One should always aim for the top. And if we are to reach the top, we must eradicate what currently sits there. The most powerful Avatar."
"Why must you be the top?! Do something so horrid? What is this obsession?"
"Our branch has a gift like no other. We wish to be most superior and respected. We will have ultimate control, even if I am dead, my spirit longs to see the day where we are not seen as criminals but rather as leaders, hereos, masters, gods! If there is our unique bending style which no one can defeat, why must any other exist? It will create equality. A single leader over a sea of non-benders. It is truly an ideal world. This world needs a god, we wish to provide them with one."
Lin leaned back. So they had caught their criminals and she could already say they were guilty. Plus she had secretly recorded the entire encounter with them, so there was no way Narda could deny anything she had said.