The Foundling begins with a chance encounter between an old man named Balbus and a small boy named Elerian. They meet in the depths of a dangerous forest, and believing Elerian to be an orphan, Balbus decides to take him home, a decision that turns his quiet life upside down. Balbus discovers that Elerian is no ordinary child, and that he is being hunted by a number of enemies, all of whom are determined to kill him for reasons of their own. To keep Elerian alive, Balbus is forced to contend with shape shifters, Goblins, and other magical creatures. He is often aided by his good friend Tullius who possesses magical powers. And sometimes, Elerian, who possesses magical powers of his own, is forced to step in and rescue both of his protectors.