Batman. Ciudad de locura (DC Black label, 2)

Buried deep beneath Gotham... lies another Gotham. A nightmare populated by twisted reflections of the surface dwellers and fueled by the fear and hatred that seeps in from above. For decades, the portal between the city's two identities has remained sealed and guarded by the Court of Owls. But now it has opened, and the twisted version of the Dark Knight has escaped... to capture and train his own Robin. Batman must forge an uneasy alliance with the Court to stop him and prevent anything else from escaping to the surface.