The impossible has happened and Batman is on the verge of being taken downby an enemy he cannot defeat: a virus for which there is no cure! And the onlyhope for his salvation is the Joker! Who infected Batman, what does the ClownPrince of Crime know, and how will The Dark Knight get that information?Together, the enemies crisscross Europe, desperate to find answers before timeruns out. Traveling through Europe to destinations like Prague, Paris, and Rome,Batman must defeat this disease before it defeats him. The sworn enemies areforced to work together to find the cure to what ails them. Collects Batman:Europa #1-4 of the 4-issue miniseries.