A young psychiatrist with a potential cure for the madness that haunts Gotham City, Dr. Harleen Quinzel must prove her revolutionary theory to a skeptical establishment by delving into the disturbed minds of Arkham Asylum's deadliest inmates. But the more time she spends with her criminally insane subjects, the closer she is drawn to one patient in particular--and the further she falls away from reality.

"DC Black Label"--cover. "Harley Quinn created by Paul Dini and Bruce Timm." "Originally published in single magazine form in Harleen 1-3 [miniseries]"--Title page verso.