This is set in the world of Barbara Gordon/Batgirl world of the New 52/Burnside and after.
The Fugue has been an adversary for Batgirl’s on a number of occasions and while she normally hands his ass to him on a plate he’s come close to beating her as he has a way of hacking into the cybernetic implant that lets her walk after her spine was damaged.
The idea behind this RP is that the Fugue is back and wants revenge. He’s realised his mistake, last time he just messed with her mind, but now he’s planning on messing with her body. By hacking into the implant he can take direct control of her actions. This means he can now blackmail Batgirl into doing what he wants, or he’ll take control of her body and make her do even worse things.
Further plotting and planning will be required as The Fugue isn’t the best villain so hasn’t come up with much more of the plan beyond this. Not my fault, honest.
If anyone is interested in developing this idea further just drop me a line.