Four years ago, after Seyeon lost her memories for five months, she began to dream of this every night. A dream where she made love to a man whose face she couldn't see and whose identity remained a mystery. His body was strong, but his touch was gentle, and every movement he made was mesmerizing. Every time Seyeon felt those clear sensations, she was rendered confused, wondering who this man was. Was he her lover? The father of her child? Or just a man she knew for one fleeting night? Amidst the doubts that remained unanswered, one day, she met Soohyuk, her father's personal doctor who had just moved from America. And when Seyeon first saw him, she felt an inexplicable sensation… A strangely familiar feeling. At the same time, when Soohyuk looked at her, his face froze in shock.