Harley's adventures continue in this all-new story, as she finds herself facing one of her toughest challenges yet!

Thanks to one very murderous new vigilante roaming the streets and a new homicide detective convinced Harley's the killer, the Maid of Mischief finds herself behind bars--framed for crimes she did not commit! And of course, there are plenty of inmates in Blackgate Penitentiary not happy to see Harley... but is she locked in with them, or are they locked in with her?

It's clear Harley needs help, and luckily it arrives in the form of Batwoman! Can this unlikely pairing solve the mystery of unmasking the violent vigilante known as Verdict?

This volume collects Harley Quinn #13-17.