Despite all her best antics none of the Joker's men was telling Batgirl where Joker's new hideout was. She had tried every antic she knew, dangling them over a tall building, twisting their body parts in ways they shouldn't be twisted, she even went to extreme tactics Batman wouldn't go and took a blow torch to one of them, still even then no one would talk.
Desperate to find Harley, and with nothing working, Batgirl finally used a device she made a few months back but had yet to use. It was like a gun, and was even shaped like a assault rifle, but instead of bullets it shot out a tracking chip that allowed her to track someone's every move.
Three days after Sarah's funeral and Batgirl's search for the Joker, Batgirl took her tracking gun to the streets. Perched on a rooftop high above the city Batgirl searched the streets for one of Joker's goons to track. After a good forty minute wait she spotted one of the men she interrogated earlier that worked for the Joker. He might have refused to talk but Batgirl didn't need him to anymore. Aiming her scope to line up directly with the back of the goon's neck, she fired her tracker, the chip landed perfectly in the middle of the goon's neck.
The goon sensed a little pinch and swatted at his neck thinking whatever stung him was a bug. The chip had dug it's way into his skin at that point, there was no way it was getting out without digging it out.
"Now let's see where you are off too," Batgirl chuckled taking out a small screen that tracked the guy's every move.
"Miss Gordon, I hope you have a plan of action for when you take on Joker," Alfred's voice spoke up from Batgirl's earpiece.
"I will make sure he never harms anybody again."
"Miss Gordon there is a fine line between justice and vengeance and I fear that you are own the verge of crossing it. Don't let Miss Strong's death cause you to forget who you are."
"Alfred I told Batman to stay out of my way, I advice you to do the same. I will do what must be done."
"Just remember what that mask you where stands for Miss Gordon." Alfred hung up, knowing that he wouldn't get anywhere else with Batgirl.
After thirty more minutes of waiting Batgirl finally say the tracker enter a building that matched the type of building Joker liked to hide in. It was the old Gotham museum for Science and History. When Barbara was a kid she would often have class field trips to that Museum before it relocated downtown after a fire when she was in High School. There had been discussions on what to do with the old building but so far the city could not reach a agreement. So for now it was fair game for people like the Joker.
"Gotcha," Batgirl smirked as she took out her grappling hook and made her way to the museum.
When she arrived she perched herself upon a tree and using her X-ray lenses on her cowl she started searching through the museum for any traces of Joker and Harley.
After a few minutes she sensed Harley, she was in the old Dinosaur exhibit, once, filled with model skeletons of several species of dinosaurs, now just filled with the scum of Gotham's worst.
After taking out the few men that guarded the outside of the museum Batgirl made her way inside the museum. She made sure she was as quiet as possible, not wanting to attract any unwanted attention until she was ready. Crouching behind the wall outside the Dinosaur exhibit, she noticed a couple of Joker's men giving Harley some tattoos. Batgirl gasped at how unrecognizable Harley was, her skin was now as pale as the Joker's and her hair was no longer the pretty blonde but now a strange combination of white, blue and pink.
"My god Harley what have they done to you?" Batgirl gasped noticing how different Harley appeared to her old form.
It was suddenly that Joker walked in the room, the mere sight of him made Batgirl's blood boil."Good evening lady and gents. I just want to inform you all that we are all running right on schedule."
"But boss, how can we be on schedule when you haven't even told us the plan yet?" One of Joker's men asked confused.
"I like to start every meeting with positivity. A little positivity goes a long way you know? Now I'm sure you all wonder what all I've been cooking since my latest stay at Arkham? I ensure you it's a doozy. It's quite simple, we're going to take over the city."
"And just how are we going to do that with the Batgirl on our tail?" The same goon asked.
"Are you questioning my Mista J?" Harley scolded shooting up from her chair and wrapping her hands around the goon's next and starting to strangle him. "The same Mista J that has gone round and round with the other Bat freak, that if he chose to could carve you like a Jack O lantern and gut you like a fish, THAT MISTA J!?"
"No," The goon cried shaking with fear as he pleaded Harley for mercy, "No not at all." Batgirl was shocked at the shear sight of Harley's ruthlessness, this was definetely not the same Harley she knew.
"Now, now, let's not get hostile now," Joker said calmly. "I'm sure Dagger was just asking a simple question and not questioning my authority." Joker glared at the goon called Dagger and glared fire into his eyes "Weren't you Dagger?"
Dagger gulped and gave Joker a nervous thumbs up.
"Anyway, as I was saying. With the gang back together the Batgirl will not be a problem. See, soon we will launch our attack on the city, we will abduct all the leaders in Gotham, from the mayor to the idiot Commissioner to gave those bat freaks the power to run loose in this city. Once that is done we will force our way into power and put a massive hit out on the Batgirl. With the police unable to intervene due to being overthrown the Batgirl will be good as gone."
Batgirl had heard enough, it was time to intervene. "Sorry, won't be happening today Joker!" Batgirl came out of her hiding spot and revealed herself to the Joker, Harley and all of their men.
"Well speak of the devil, change of plans boys, kill Batgirl now, then the city will the ours."
All of Joker's men plus Harley attacked Batgirl, Harley was the first to attack, swinging her bat at Batgirl, missing by just a couple of inches. As much as it pained Batgirl to attack her friend she had to protect herself as well, she delivered a blow upon Harley's gut, grabbing the bat out of her hand and knocked her onto the ground as she turned her attention to everyone else.
With Harley's bat in Batgirl's possession Batgirl swung at one of the goon's hitting him over the head, giving him a massive concussion as he laid on the ground in pain. Batgirl then lifted up her right leg and delivered a jaw cracking kick on another guy's chin. Taking out her grapple Batgirl shot up in the air and took out a couple batarangs, she threw them down at a couple of goon's she hit one in the shoulder and another one in the side, both Batarangs stuck into their skin causing them to scream out in agony at the pain. Batgirl then landed on top of another goon's shoulders, the force of Batgirl's landing caused the goon's shoulders to dislocate. Batgirl could hear the bones crack as she landed, followed by the agonizing scream from the goon. Once she landed one goon swung at her, but Batgirl easily dodged the blow and delivered two quick blows to the guy's gut and face before throwing him over her shoulder and finishing him with one more blow to the head. She then grabbed another guy and smashed his head into the wall with enough force that it caused a hole in the wall. Finally Barbara finished up the final goon, as he swung at her Batgirl kicked him into a glass display, the glass shattered, cutting the goon as he lay in pain surrounded in shattered glass shards.
With the last of Joker's men down for the count Batgirl put her focus back on Harley. Before she could make her getaway Batgirl tied her up to a pole preventing her from escaping.
"I don't know what Joker did to you Dr. Quinzel but you and I are going to have a serious heart to heart later.
"Go to hell Bat freak." Harley hissed.
Batgirl didn't respond, her main focus now was on Joker. As Batgirl ran off Harley turned to the goons laying on the ground. "Hey nobody said you could take a break! One of you get your ass over here and untie me or so help me I will drive your stinking carcasses to the zoo and dump you into the hyena exhibit!"
Joker's laughter could be heard all across the museum, mainly because the walls had a heavy echo. Batgirl turned on the X-ray goggles to try to see if Joker was hiding in one of the many rooms in the museum. What she didn't expect was that Joker was actually hiding up above her, having climbed up on a high shelf. Batgirl didn't even notice him until he dropped down on her with a knife.
"Mind if I drop in?" Joker laughed, landing on Batgirl's shoulders. Batgirl groaned in pain as she felt Joker's entire body weight land on her. She had barely had the chance to get up before Joker slashed her left arm with a knife, slicing her suit open.
"Ooh that looks like it's going to leave a scar," Joker laughed before swinging his knife again. "Here, have some more!" Joker swung his knife wildly at Batgirl, she did everything she could to avoid Joker's blade but he still was able to find Batgirl's left leg and right shoulder before with the knife before Batgirl finally grabbed Joker's wrist and knocked the knife out of his hand.
That was when Batgirl let out some revenge on Joker, she delivered a punishing blow to Joker's gut, knocking the wind right out of him. Joker gasped and wheezed trying to catch his breath before Batgirl pinned him against a wall and delivered a huge blow to Joker's right eye.
"What did you do to her!?" Batgirl screamed as she delivered blow after blow to Joker's head. "What did you do!?"
Batgirl wasn't done yet with the Joker, not even close. Before Joker had the chance to answer Batgirl threw him against a wooden table. The table split in two as Joker slammed into it. As Joker laid on the ground Batgirl ripped off a table leg and started striking Joker repeatedly with it.
"Harley was a innocent woman, a good therapist! She wanted to help people! And you turned her into a psychopathic murderer! Why!?" The angrier Batgirl became the harder her blows became and soon the table leg she held started becoming covered in blood. "WHAT... DID... YOU... DO... TO HER...!?"
Batgirl finally paused on the beating to catch her breath, that's when she finally noticed the damage she had done to Joker. Both his eyes were swelled up from the blows, and he was spitting up blood. Despite nearly being beaten to death Joker still managed to chuckle at the whole situation. "Why do you care? Do you to have a history? Were you friends? Sisters? Lovers? Why are you so interested in Dr. Quinzel."
Seething with anger Batgirl grabbed Joker by the collar and glared daggers in his eyes "Our history is none of your business. Now I'm going to ask you one last time. What, did you do to her?"
All Batgirl's response was at first was a loud sadistic laugh from the Joker. Batgirl was about to deliver another beating when the Joker finally spoke, albeit through chuckles.
"You want to know what I did? All I did was show Harley the truth. I peeled back the layers of you Bat people and showed her that deep down, your all just maniacs like me. You lock us up in that asylum, deem us all insane, when you are just as insane as the rest of us, maybe even more. You hide your face from the public, created this false idol for the city to worship. But all you are is just a crazy little girl with a extreme case of personality issues. Your just as crazy as the rest of us."
"At least I'm not a monster like you?"
"No, you just create them!" Batgirl heard Harley's voice say from behind. Batgirl turned around and saw Harley had gotten herself free and drew a gun on Batgirl. Before Batgirl could react Harley pulled the trigger.
BANG!
Batgirl's eyes went wide as she felt her legs give in below her. Batgirl fell to the ground unable to feel her legs as she saw Blood spilling from her gut.
"Harley?" Batgirl gasped, finding herself struggling to breath.
"Aw, what's da matter," Harley teased as she stood above Batgirl with her bat in her hand. "Did the Batgirl take a bullet to da spine?"
"Harley... don't... please."
"Say good night Bat!" Harley swung her bat across Batgirl's head, then everything went dark.
In case you were wondering yes I am taking a little inspiration from "The Killing Joke" It was to big of Barbara's history to fully ignore. Although I am completely doing my own thing with it.