Superstar artist Jim Lee returns to the Dark Knight with this premiere issue! The impossible has happened and Batman is on the verge of being taken down by an enemy he cannot a virus for which there is no cure! And the only hope for his salvation is The Joker! Who infected Batman, what does the Clown Prince of Crime know, and how will the Dark Knight get that information? Together, the enemies crisscross Europe, desperate to find answers before time runs out. Co-conceived by Matteo Casali and Brian Azzarello, this 4-issue miniseries event will feature art by top talents over layouts by the incomparable Giuseppe Camuncoli (HELLBLAZER, Dark Wolverine), with the first issue pencilled and inked by none other than Jim Lee!

Forced to work with his greatest foe, The Joker, Batman reaches Prague just as the virus he’s been infected with starts to affect him. While the Czech version of Mardi Gras is in full swing, Batman and The Joker search for the mysterious Trojan Horse, a man who knows the secrets of the Colossus virus...but they’ll find more than they bargained for! The mystery deepens and the stakes get higher in the second chapter of this miniseries by Brian Azzarello and Matteo Casali, featuring fully painted art by Giuseppe Camuncoli.

Weakened by a deadly virus, Batman arrives in Paris to find some answers. But with The Joker along for the ride, Batman’s guaranteed to face terrifying challenges as they follow a trail that leads to their common enemy.