Hyo-jeong, an online fashion model, threatens imminent unemployment due to the emergence of a younger and more stylish generation. Ga-yeong, a former classmate of Hyo-from jeong's high school, tells her about a secret yoga class that aids in achieving the ideal body shape as Hyo-jeong responds to questions regarding surgical procedures and therapies. Hyo-jeong ultimately joins yoga class with three classmates: Mi-yeon, a boxer who failed to maintain her physical fitness, Ji-won, who has an unstable mental state, and Ye-na, a movie star who is morbidly preoccupied with her appearance. Bo-ra, a former yoga class student, has committed a murder in the area, prompting the authorities to examine the mystery surrounding this yoga class.