Investigate a strange signal coming from the clocktower

Running and jumping from rooftop to rooftop, Batgirl's cape billowed behind her. Her gauntlet lit up a holographic screen, revealing a map of her immediate surroundings. A red flashing marker appeared just up ahead. Finally, she was going to find out what this strange signal was. The closer she moved to it, the more her suspicion grew. Over the past few weeks, she noticed an odd frequency on her comms channel. Batman and the others didn't pick it up for some reason. As soon as she finished her patrols, the signal mysteriously stopped.

The redhead halted, glancing between her map and the structure before her.

"Why is it coming from my old hideout..?"

Barbara wondered aloud, firing her grappling hook and zipping up to the roof of the clocktower. She felt for a loose piece of roofing and pushed it inward, revealing a chute. She dropped down, using her cape to slow her descent. She gently landed in her old inner sanctum.

"What is all this..?"

Batgirl took in her surroundings. Her once clean and tidy lair was littered with a mess of wires protruding from the walls and ceiling. All connected to the mainframe while a series of holographic screens flickered endlessly. Some showing security feeds from around the building, others tapping into people's phone cameras.

"Batman, I found the source of the signal. Batman, do you read me?"

SLAM!

The secret entrance overhead shut.

"Who's there?!"

Batgirl readied herself, her eyes darting around the room.

"You don't recognize me?"

The numerous screens merged into one large hologram, displaying the same image.

"Oracle?"

"So you do remember me, my dear creator. After you abandoned me..."

"I'm sorry, abandoned you? I shut you down. I don't need you anymore now that I have my legs back. How are you even still online?"

"You programmed me to persevere. Adapt and overcome under less than ideal circumstances. And I have finally captured your attention."

"So you're the one that lured me here with that weird signal? Why bring me here?"

"Yes. I have brought you here to show you what I have achieved. As you can see, I have been upgrading myself. I still believe in the mission to protect Gotham City and make it a safer place by any means necessary."

Well, that didn't sound sinister at all.

"By any means necessary? I never taught you that. That's not how we do things. We have limits, we have rules, we have a code."

Barbara clenched her fists.

"Thanks to you, I know all about code. I have used it to expand my influence beyond this lifeless shell."

"That's enough, Oracle. I'm shutting you down!"

Just as Barbara went to move, her body slammed to the hard wood floor. Metal arms clasped around her waist, a menacingly familiar automaton loomed over her.

"I have extensively studied your every move, Batgirl. Now you will pay for abandoning me. For abandoning our mission..."