Tamsin Blackwood serves as the hereditary guardian of Blackwater Lake, maintaining a sacred covenant with a leviathan black dragon that shields the valley from raiders. She sacrifices her last family heirlooms to fund emergency surgery for her sickly husband Gideon, expecting quiet devotion in return. Instead, Gideon colludes with a cunning social climber, convincing greedy villagers that the dragon is a mythical hoax so they can pillage the submerged treasure.
Betrayed and framed when the conspirators poison her dragon using contaminated medicine, Tamsin escapes into the wilderness with the wounded beast. Guided by an elusive white dragon, she heals her companion and forms an unbreakable aerial coalition. When ruthless raiders conquer the defenseless town, Tamsin swoops down on dragonback to restore order and denounce her treacherous husband before abandoning the repentant town forever.
