Joon Soo, who decided to move to Seoul to fulfill his dream of being a musician, accidentaly meets Hee Jeong, who just broke up, while he was singing a breakup song to a monkey in a zoo. They get closed to each other through music, and Joon Soo helps Hee Jeong’s band as a guitarist. They eventually live together in a house. One day, their relationship, which was already dangerous due to their different musical world, is finalized when Joon Soo plays his part differently. Joon Soo becomes famous after he got into a big entertainment company but Hee Jeong holds concerts alone in a club. But they realizes each other’s empty space and automatically look for each other…