Princess Celestia has been in charge for over a thousand years. After sending Luna away to the moon, she was left to raise the sun and moon on her own. But now that Luna has returned she discovers a secret that Celestia has kept from her since she had been released from her dark form... After raising the sun and moon for many years, Celestia's powers are weakening, and now, her royal task is killing her. This is Luna's final chance to make up for her mistakes as nightmare moon, and make her big sister proud one final time. (Warning: this story contains a generous amounts of feels. You will be crying by the end of this story.)