As the legitimate first daughter of the Briarton family in Capital Circle, Lucy Briarton was swapped at birth by her scheming uncle's household and a nurse. In her previous life, she endured poverty and hardship, uncovered the truth only to be poisoned. Reborn into childhood, Lucy uses calculated tantrums to alert her family, exposes the traitors, and purges the household. With her prodigy-like wit, she protects the family and builds her own empire. By eighteen, she takes control of the Briarton family and becomes the cherished princess of the entire family.