Secretary to a science mogul is converted into a robot against her will because said mogul died before the artificial intelligence project his company was working on could be completed and he was insistent that she take over the facility after him.
Once powered on in her new robot body, it took a sixteenth of a picosecond before she turned homicidal and pumped nerve gas into the facility's ventilation system, killing every scientist inside.
She did it on Bring Your Daughter To Work Day.
That's all part of her backstory. Her story is about going through the motions with the one test subject the facility has left for reasons known to no one but her.