The journey to the Institute to retrieve a behavioral chip for the Overseer was successful. Not uneventful, but the team got what they came for, and more. Weapons schematics were the highlight of their little trip into the belly of the beast. After a hard reset carried out by the Vault's chief scientist, the Overseer was back to her old self. The memories were still there, untouched. All that changed was her 'moods,' so to speak. She returned to her calculated, cold persona, yet something was secretly troubling her, if such thing was even possible for a synth.
She was worried that whoever hacked her in the first place could do it again, and put the entire Vault at risk. The synth really didn't want to be the cause of extinction of the very people she was trying hard to protect. A beeping interrupts her train of thought and a voice over the radio announces they've got 'movement' on the surface.
"Movement? What kind of movement? And why should I care?" the synth sounded annoyed.
"Uhm... ma'am? There are people out there. Looks like they are being chased by a group coming from northwest, carrying Fat Man's, judging by the sound of the explosions. Big bada boom!"
"Excuse me?!"
"Nothing... These people really need our help, ma'am!"
"I'll be right up."
Minutes later, the Overseer was staring at the terminals linked to cameras outside the Vault. Shadowy figures moved and gathered in the darkness. One of them was looking straight at a camera.
"Those are not people! Those are ghouls," the synth thought to herself.
The explosions were getting closer. If she won't let them in, they are all dead for sure. The Overseer was facing a dilemma: letting the ghouls in and risk exhausting the already scarce supplies of Vault 121 even faster, or not interfering at all and let them die. After several seconds of intense calculations that would normally take a human a week to compute, she has made up her mind.
"Security, wake everyone up. NOW! We are going to help those people."
The explosions were now very close. The ghouls gathered in small groups, waiting, shivering.
"Get those people inside!" the synth yelled. "Everyone, positions! We can't let the enemy escape; they know the location of our Vault."
A projectile exploded so close to the Overseer that she couldn't see anything for several seconds. Her vision cleared as she raises her trusty 10 mm. "ATTACK!"