Issue: Batgirl #14
Subtitle: A Knight Alone
Date: May 2001
Feature Characters: Batgirl (Cassandra Cain)
Supporting Characters: Barbara Gordon
Guest Appearances: Batman (Bruce Wayne)
Other Characters: Johnson, Tom, Jim, John, Rachel
After disrupting an entire government agency out-of-uniform, Cassandra gains the government's unwanted attention. Fortunately, to her, she had no identity to compromise - except her future one; a point that Oracle tried to convey to her but failed to get through.
That night Batman comes, the man Cassandra had saved was killed. Batman took her to the men who killed him and allowed her to have the pleasure of incapacitating them.
Aware that her identity was compromised, Batman relocated her to her own cave, telling her she couldn't stay with Oracle anymore due to her current status under the government's eye possibly compromising Barbara's identity.
"...but what about your future? What if you want to... go to school? Drive a car? Get a job? They've got you on file. You're never going to be able to be anything...besides Batgirl."