Lee Yong-yeon

A staircase leading to a schoolgirls' dormitory usually has 28 steps, but sometimes a 29th step appears. Any wish you make while standing on this step comes true, even if it must come true in the most horrific way possible.

After being replaced by a younger coworker, TV host Hyo-jeong enrolls in an intensive yoga course that has serious consequences for anyone who fails to follow its rules.

Jeong-in, who recently divorced a violent husband, moves back to her hometown. While suffering from nosy villagers, she is soon drawn to Hye-jung, a newcomer to the town. Two young women soon get closer and Hye-jung’s freewheeling and confident character inspires Jeong-in to break free of her wretched life. One day, Hye-jung suggests Jeong-in share a ‘hobby’ with her, and now their bloody hobby is about to begin.