Jisu, a virtual YouTuber with a dream of becoming a singer, hides her face and performs under an avatar. After passing the first round of an audition, she decides to lose weight quickly for the next stage and enters the strict Seonnyeo Fasting Center. On her way there, she meets a man who resembles her ideal type. However, the fasting center's rules are tough, and she constantly clashes with the grumpy manager, Yunho. Amidst hunger, the tempting smell of grilled pork wafts from a nearby restaurant owned by the man she met, leading Jisu into a moral struggle between temptation and her dream of becoming a singer.
