Dark Nights: Death Metal The Darkest Knight contains Dark Nights: Death Metal - Legends of the Dark Knights #1, Dark Nights: Death Metal Guidebook #1, Dark Nights: Death Metal - Trinity Crisis #1, Dark Nights: Death Metal - Speed Metal #1 and Dark Nights: Death Metal - Multiverse's End #1, inspired by the series created by Scott Snyder and Greg Capullo.

The DC Universe has become engulfed by the Dark Multiverse, where demons dwell and reality is overrun by monstrous versions of the Dark Knight, all ruled by the Batman Who Laughs. As Wonder Woman, Superman, Batman, and other heroes fight to survive in this strange new landscape, one cloaked figure has been observing from the sidelines, creating a guidebook to this new world and its evil leaders in the hope of forming a plan of justice…and penance.

Meanwhile, the heroes have split up on separate missions to take back the Earth. Superman, Batman, and Wonder Woman launch a head-on assault on Castle Bat; the Flashes are in a race to the death with the Darkest Knight; and the Green Lanterns try to save the heroes of the dying Multiverse!