"Regarding De Willoughby's Claim" is a novel-film by Frances Hodgson Barnett about the importance of family ties and trying to find the truth in a case of inheritance. The main character, the young heiress Betty Wide, faces the difficulties of establishing her true inheritance and the fair distribution of the property. The book emphasizes the importance of justice, devotion to the family and mutual understanding between people. With vivid descriptions and interesting plot twists, Frances Hodgson Barnett takes the reader through a story that will touch the heart of anyone who loves concepts like family, loyalty, and honesty.