Hyo-jung ( Eugene ) is a star host at her home shopping network, until a younger and more attractive host suddenly threatens her throne. When her position becomes threatened, she begins to lose confidence and self-esteem. This is when Hyo-jung runs into an old high school classmate. Sun-hwa (Lee Young-jin), who used to be the most unattractive girl in school, has now transformed into an unbelievably beautiful woman. When Sun-hwa lets her in on secret spiritual training lessons, Hyo-jung soon finds herself standing in front of the yoga academy. At the yoga academy, Hyo-jung meets four other girls, each with their own desires and discontentment with their looks. Led by their mysterious yoga master, Na-ni, the five women swear an oath to follow the five harsh regulations of the academy and begin their secret spiritual training. Only the thrist for unparalleled beauty pushes them forward through the rigorous training sessions—until one by one, strange and eerie events begin to unfold at the yoga academy.