A struggling fashion model, Hyo-jeong, faces job insecurity due to the rise of younger and trendier models. She discovers a mysterious yoga class that promises a perfect physique, joining forces with three classmates: a former boxer, a woman with mental health issues, and a movie star obsessed with her appearance. However, the class's dark secrets are exposed when a murder occurs, committed by a former student, and the police begin to unravel the enigma behind the yoga class.

The Cursed Lesson
In a ruthless fashion world, a model's desperation to stay on top drives her to try extreme measures, including plastic surgery and an enigmatic yoga practice, to outshine her rivals.