Hanna Kang is an overweight phone sex part-timer and a ghost singer for Ammy, a famous pop singer who actually lip syncs her songs instead of singing live. Hanna has a crush on Sang-jun, a director whose arrogant father owns the record company Ammy is signed to. One day, Hanna receives an outfit from Sang-jun with a note to wear it to his birthday party. However, it actually came from Ammy, who wears the same outfit just to humiliate Hanna. While crying in the restroom, Hanna overhears Sang-jun telling Ammy that even though they are just using Hanna for her voice, they must be kind to her so she will not abandon them. Heartbroken, Hanna attempts suicide but is interrupted by a phone call from one of her phone sex regulars, a top plastic surgeon, and persuades him to perform head-to-toe plastic surgery on her.