Woo Su-bin, a new director, wins an award at an international film festival. During his acceptance speech, he thanks his first love for giving him a dream. After the festival, he visits Korea to meet his first love, Joo Yi-jae who wanted to become a director but works as a reporter. During a conversation, Su-bin suggest they make a film together. However, Yi-jae firmly rejects the offer, revealing deep scars he left on her.

During their senior year of high school, Yi-jae is an aspiring amateur filmmaker. Su-bin also decides to become a director after helping Yi-jae and spending time with her. Although Yi-jae wins an award at a youth film festival, her family fails to show up. Only Su-bin is there to celebrate with her, and the two spend time together after the festival, promising to make movies together in the future. However, neither of their families supports their dreams. Many years later, Su-bin returns to Korea and reunites with Yi-jae, and the long-hidden secret behind their separation begins to unfold.

Yi Jae travels to her hometown to meet and cast Su Bin. As they spend time together, they share a deep conversation about their pasts. However, when Su Bin reveals his hidden history, Yi Jae responds with sarcasm, finding him pathetic. Later, Yi Jae discovers she has been betrayed by her long-standing bond. Meanwhile, Yu Geon is struggling to achieve his own success. One day, he runs into Ha Na again on set. After a brief chat, Yu Geon opens her eyes to a whole new experience. Ha Na later visits Yu Geon’s house, where the two begin to form a new bond.

After mulling it over, Yi Jae finally makes a contract with Su Bin, and they move to Bunam to write the script for Gyeongseong Love Song. Working together, Yi Jae’s feelings towards him begin to grow despite herself. Meanwhile, Ha Na protects Yu Geon from Sang Yeon. Sa Rang accidentally finds a man she has dreamed of and makes advances.