Hyo-jeong, an online fashion model, is in danger of losing her job because younger, more fashionable people are coming up behind her. Ga-yeong, a friend from high school, tells Hyo-jeong about a mysterious yoga class that helps people get in great shape. Hyo-jeong is answering questions about surgeries and treatments. Hyo-jeong eventually goes to yoga class with three other students: Mi-yeon, a boxer who didn't keep her body in shape, Ji-won, whose mind isn't stable, and Ye-na, a movie star who is crazy about how she looks. While this is going on, the police start to look into the mystery of this yoga class after learning that a woman named Bo-ra, who used to take this class, killed someone in the neighborhood.