After traveling the different realities of the Dark Multiverse, Duke Thomas returned to his Earth to find the cosmic destroyer Barbatos, now in his final form as a dragon, along with his other Dragons of the Bat. With the help of some allies, Duke defeats Barbatos and his forces, but the darkness still consumes this universe. Despite the ultimate loss, Duke does not stop his mission. Creating a Batsuit of armor from the hide of the defeated dragon, Duke takes the powerful Parall-Axe and ventures into the Dark Multiverse alone to hunt any remaining monsters!