The entire narrative of "Candy Candy" is built around a series of shocking twists and revelations that culminate in the final episodes. The first major spoiler is the sudden death of Anthony Brown. After a period of idyllic first love, he is thrown from his horse and killed during a fox hunt, an event that abruptly ends Candy's childhood innocence and sets the course for the rest of her life.
The second major plot turn is the tragic conclusion of her romance with Terry Grandchester. After overcoming numerous obstacles to be together in America, Terry is honorably bound to his co-star Susanna Marlowe after she is permanently disabled while saving his life. Candy makes the selfless decision to leave him, recognizing that his duty and guilt would make their happiness impossible. This cements the series' melodramatic tone, denying the protagonist a conventional happy ending with her passionate love.
The ultimate spoiler and hidden meaning of the series is the true identity of William Albert Ardlay. Throughout the story, Candy is supported by two mysterious male figures: her anonymous, wealthy benefactor, "Great Uncle William," and the kind, bohemian vagabond, Albert, who becomes her close friend and confidant. In the final episode, it is revealed that they are the same person. Furthermore, Albert reveals that he is also the "Prince on the Hill," the idealized boy who comforted Candy as a child. This revelation reframes the entire series: the man who was her protector, friend, adopted father, and first love were all one person. This suggests that the steady, selfless, and supportive love represented by Albert, rather than the fleeting innocence of Anthony or the passionate tragedy of Terry, is the true foundation of her life and the ultimate source of her happiness and belonging.