Mirabel is a famed mercenary whose mother, Cornelia, had long suffered from the guilt of leaving her family, the Grand Duchy of Citron behind. After Cornelia's failed attempts to contact her family left her distressed and led to her death, Mirabel sought revenge, tracking down her grandfather, Grand Duke Citron, and the assumed cause of all her mother's misery. After finding out that he too was betrayed, Mirabel meets an untimely death at the hands of the true culprit, only to wake up back when she was nine years old, with her mother still alive. Determined to stop her mother's death, and seek revenge against the true villain, Mirabel sets out to make things right. But her choice to meet her grandfather makes her cross traces of her past, while she experiences a life she never knew before.