In a dark future America that has devolved into unending civil wars, orphans Mahlia and Mouse barely escape the war-torn lands of the Drowned Cities, but their fragile safety is soon threatened and Mahlia will have to risk everything if she is to save Mouse, as he once saved her.

In a future beset with rising seas, corporate government, and constant civil war, a bioengineered half-man/half-beast super-soldier who calls himself Tool breaks his conditioning to overcome his genetically enhanced sense of loyalty to the corporation that created him and seeks revenge against his old masters.