The film is based on a combination of plot and character elements from the first four books of Ursula K. Le Guin's Earthsea series (A Wizard of Earthsea, The Tombs of Atuan, The Farthest Shore, and Tehanu), as well as the manga The Journey of Shuna by Hayao Miyazaki.
O filme está baseado nunha combinación de argumento e personxes dos primeiros catro libros da serie Earthsea de Ursula K. Le Guin (A Wizard of Earthsea, The Tombs of Atuan, The Farthest Shore e Tehanu), así como no manga The Journey of Shuna de Hayao Miyazaki.