Batman: Death Mask

Issue 1: There's a new serial killer in Gotham, and he may have ties to the training Bruce Wayne acquired as a young man in Japan. Does the murderer know Bruce Wayne is the Batman

Issue 2: Bruce Wayne must confront his past and examine how the time he spent in Japan as a young man training to become Batman affected him...and whether his experiences then somehow led to the killer now rampaging throughout the underworld in Gotham.

Issue 3: The mystery of the deadly masks is uncovered, as the killer reveals his long-standing deep-rooted connection to the Dark Knight and the time they spent together as students in Japan years ago.

Issue 4: Events come to a head as the Batman must defeat the Oni — but before he can confront it, he must first face his own troubled past.

(Source: DC Comics)

Batman: Death Mask was first published in English by DC Comics in comic book format, with four issues printed from April 9, 2008 to July 30, 2008. The chapters were collected in one volume, published on October 29, 2008.