From the publisher:
Terrorists and crime lords have taken over the watery kingdom of Atlantis, but a rebel alliance is forming in the darkened corners of the city. Arthur Curry, along with a mysterious and powerful young woman named Dolphin, quickly becomes central to intrigues that forebode an Atlantean civil war. When rumors of Aquaman's activities reach land, the recently exiled Mera vows to join him in his quest to restore sanity to the sprawling domain of Atlantis.
Writer Dan Abnett (Guardians of the Galaxy) completely reinvents the Sea King with awe-inspiring artist Stjepan Sejic (Secret Origins) in this special deluxe edition of Aquaman: Underworld. Collects Aquaman #25-30 and includes a generous selection of never-before-seen bonus material from the artist.