One day, she appears as a hope to hidden lives of these brothers. Unblessed twin was born. Sang Hyun and Dong Hyun are Siamese twins. Their lives were hidden out in a dark house, raised by their father. Their thoughts and behaviors are always the same, but unable to face to face each other. One day, twin’s father found Dong Hyun dreaming of being a novelist, and he happened to meet bright and kind illustrator wannabe Seung Ah, who was drawing a caricature in amusement park, he asks her to help his son to publish a book together.