Marianne, daughter of a countess from a poor family, is disliked by her stepmother and stepsister. Instead of suffering a tragic fate, Marianne uses her genius intellect to help orphans, reform her territory, and invent new technologies. Supported by those around her, she gains love and admiration, even attracting the attention of the second prince. This is a story of a talented girl who brightens the lives of those around her.