Catwoman, The Joker, Poison Ivy, and The Riddler—any one of these Batman rogues may prove to be the mysterious serial killer known as “Holiday,” a murderer who kills according to the calendar. And now, a still-learning Batman must uncover the killer’s identity before they kill again!

Poison Ivy has ensnared Bruce Wayne with her charms, but Selina Kyle is hardly the type to step aside when romance is at risk! It’s Catwoman to the rescue as the feline plans a most daring attack…on St. Patrick’s Day.