What if, 16 years before the 2017 DuckTales series, there was another McDuck? One who showed up abandoned one night on Scrooge's doorstep and whose grandmother was Scrooge's sister, Matilda?
After her cousin Della takes the Spear of Selene, Julie is left with her Uncle Scrooge and soon meets her younger cousins, Huey, Dewey, and Louie Duck, ten years later. But her past is still shrouded in mystery. Who were her parents? Why did they leave her? And are they still alive?
Reunited, the McDucks seek new adventures to finish the work of Scrooge's childhood idol. New enemies arise, secrets are revealed, and the fate of the world, and adventuring itself, lay with the family. Will they succeed? Or will evil triumph?