Following the events of The Joker Vol. 1 (Infinite Frontier and the Joker War), the Joker is on the run and now he's off to Europe?! Jim Gordon pursues the madman, but the seeds of doubt begin to sprout...if The Joker didn’t gas Arkham Asylum, who did? And what’s the next move for Vengeance, daughter of Bane?

This story will leave you searching for answers at every turn—and even questioning if Gordon will risk his own life to save…The Joker?