Hanna Kang is an overweight phone sex part-timer and a ghost singer for Ammy, a famous pop singer who actually lip syncs instead of being famous for her own vocal talent. Other than that, Hanna has a huge crush for Sang-jun who's a director and whose arrogant father owns the entertainment company. One day, Ammy purposely insults Hanna's weight in front of Sang-jun during his birthday party, knowing well that Hanna likes him. 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 walk out on them. Heartbroken, Hanna attempts suicide but is interrupted by a phone call from one of her phone sex regulars who is a top plastic surgeon. She persuades him to perform a head-to-toe plastic surgery operation on her. Hanna puts herself in seclusion for a year as she recovers from the changes from the surgery and weight loss.