After an extremely horrendous mishap, Kim So Hyun lost her desire to live, Yet, life needs more from her, She lost her memory and experienced passionate feelings for her stepbrother Yong chal without knowing the significance of love.
She is unaware of how Prince Shi Hwang became hopelessly enamored with her from the beginning. He'd never been close to another lady before, so he'd gone out of his way to get close to her.
She was lucky to be loved by a mysterious man who came into her life unaware of her true identity.
So Hyun discovers fragments of her memory in which she has an enigmatic lover, a perplexing man who has generally protected her in difficult situations. She doesn't see him, but he's nearby like a shadow.