Brother and sister team Midnight and Aurora Pendragon have a successful airship business taking clients on trips to be photographed with their pet pterodactyl. The last thing they expect is to have one such trip hijacked by the dashing adventurer Voltaire Crevin and his right-hand man Trevilian Hawke.

While his sister and Voltaire repeatedly lock horns, Midnight finds himself increasingly drawn to Trevilian. Finally, Voltaire explains they are trying to prevent a weapon of mass destruction from falling into the hands of a ruthless, secret organization, the S.O.R.

With Midnight’s help, they take the airship down into an extinct volcano to find that not only does Atlantis still exist, but the weapon is in the hands of the few remaining Atlanteans. But if Voltaire had believed the S.O.R. were ruthless, it's nothing compared to that of the Atlanteans who seek to return to the surface and rule the world using their ultimate weapon: The Leviathan.

Midnight’s feelings for Trevilian deepen as they seek a way to stop the Atlanteans and escape from Atlantis. Danger comes in many ways and takes many forms, each more deadly than the last. Can Midnight and Trevilian survive long enough to know whether love never dies?