Ha Rip is a successful composer, and all of his songs top the charts and win many awards. One day, he is informed that his 10-year contract with the devil will soon terminate, and as per the contract, the devil will take Ha Rip’s soul. And he gets involved in strange situations. What is the true identity of Ha Rip?

I Gyeong is a nameless singer-songwriter who has a miserable past. She goes to Ha Rip after finding out he released the song she wrote, and Ha Rip realizes that all his music are stolen and inspirations from others. Out of guilt, Ha Rip wants to terminate the contract. However, there is a price to pay for.