A nonstop action story set in a near future where civilization has collapsed into a wild, lawless land. Gear, a boy who runs a "thief shop" that reclaims items unjustly stolen, finds himself pursued by assassins after taking on a request from a mysterious girl named Noa.

Set in a war-torn reimagining of 1914, Leviathan follows Alek, a fugitive prince of the Austro-Hungarian Empire, and Deryn Sharp, a daring young girl disguised as a boy to serve in the British Air Service. When fate throws them together aboard the HMS Leviathan, a massive, living airship made from genetically engineered creatures, they embark on a world-changing adventure that will challenge everything they know about war, loyalty, and identity.

Specials included with the DVD release of the second season of bundled with volume 8.1 of the manga.