"Has the one I've been searching for been you this whole time?" This is the story of Garnet, a servant who transcended her social status and shared a heartfelt bond with Louis, the duke's heir. However, Louis lost his sight in an epidemic and departed for distant lands to seek treatment. At their parting, he swore to marry Garnet upon his return, and set off on his journey. But time passed, and when they finally met again, he was found to have lost his memory, transformed into a different man feared as the "Cruel Grand Duke." Louis had forgotten that day's vow and coldly pushed Garnet away. Even so, the heart that should have forgotten everything instinctively sought only her, the one who held its sole memory! What will be the fate of their burning love, cruelly trifled with by destiny...?