At the end of the Jurassic, dinosaurs live in an uneasy period of peace, after hastily forging a truce that ended years of war. The lands are divided; on one side the plant-eating sauropods rule, led by the royal Apatosaurus family, a strong-willed group prepared to defend themselves at all costs.

But some dinosaurs, tired of living in the shadows, set in motion a plan that threatens to start a new war. In a world of gullible stegosaurs, militaristic ankylosaurs, vicious allosaurs, stealthy pterosaurs, and conniving compsagnathids, unlikely alliances emerge in a time of crisis.

Told from the point of view of multiple anthropomorphic dinosaurs, Dinosaur Wars: The Fall of Two Kingdoms weaves a complex, Game of Thrones-esque tale of a mother abandoning her duties to save her child, a young carnivore proving her worth to her pack, and a forgotten king undertaking a desperate journey. Amidst schemes, treachery, and loss, the apatosaurs, their friends, and their foes must face the consequences of decisions made by their elders long ago—decisions that now endanger their very existence.