A BRAND-NEW VILLAIN STALKS THE STREETS OF GOTHAM CITY! When we last left Bruce Wayne he was offered a mysterious youth serum, known only as Sangraal, that promises to rejuvenate his body and mind–making him as strong and nimble as he once was. But can he possibly accept this strange gift? Meanwhile, the sinister, scalpel-fingered villain known as Asema stalks the shadows of Gotham, slaying small-time criminals with surgical accuracy. But what is the purpose of these murders, and how do they concern the Dark Knight?