Emilia is a marquis's daughter who suffered from neglect and cruelty in her first life. Even her fiancé, Reynid, seemed completely indifferent to her. After being targeted by a dangerous princess and falling into the abyss known as God’s Judgment, Emilia wakes up and discovers that she has traveled back to the age of twelve—the day her engagement was first arranged. This time, Emilia intends to avoid the painful fate she experienced before. But something is different. Reynid, who was cold and distant in her first life, suddenly becomes deeply protective and affectionate toward her. He remembers their previous life and is determined to protect Emilia this time. As Emilia develops her magical abilities and uncovers the dangers surrounding the kingdom, the two must work together to change the tragic future awaiting them.