It looks like a well-deserved day off for the Suicide Squad, until things go off the rails when the bizarre energies of the dark sphere Amanda Waller's team brought back slowly drive everyone in Belle Reve Penitentiary to acts of violent, bloody madness. Everyone except the crown princess of crazy, Harley Quinn, who's somehow been...cured? Now contains back-up story featuring art by Declan Shalvey.  The chilling history of the Suicide Squad's most mysterious member, this lavishly illustrated story reveals how the deadly warrior Katana came to be.