The secret love of a man who becomes a woman, starts now.So-hee has been seeing Tae-woo for a long time. One day, a new man named Eun-hyeok appears in front of her and proposes. So-hee has already promised to marry Tae-woo so she's not easily moved by Eun-hyeok's proposal. She refuses him by saying she loves women more than men and he becomes shocked. He goes under gender transplant to go back to her and becomes a woman named Eun-joo.Eun-joo moves close to So-hee and Tae-woo's honeymoon house. She watches their life day by day. She plots to take So-hee away from Tae-woo...?