Barbara Gordon as Batgirl teams up with Black Canary to stop some guy from releasing all the villains in Arkham Asylum. Because they're too late she tells Canary too run to get help and will face the villains alone. She is defeated and wakes up, tied to a chair.
All of this however is a mind trap from Spellbinder who is tying to find out who Batman is. To do that she mind-controlled Barbara Gordon. Barbara however is now tied, but gets up and defeats Spellbinder.