Patrolling the Atlantic Ocean, Aquaman and Aqualad are alerted to danger in Atlantis, by a signalling lantern fish. Racing to the ancestral home of his mother's people, Aquaman encounters the Atlantean, Pomoxis, just outside the great domed city. It is Pomoxis who has sent word to Aquaman, via the lantern fish, that Atlantis was being threatened. A series of underwater explosions have been occurring with alarming frequency, not far from Atlantis. Pomoxis fears that the detonations will grow nearer still, potentially reaching Atlantis, utterly destroying it. Aquaman and Pomoxis race to investigate the source of the explosions, leaving Aqualad behind, to inform the Atlanteans that help has arrived.