Lee Seon-b

This film is adapted from a novel of the same name. The material is drawn from the humidifier disinfectant incident that occurred in 2011. Through this incident, it tells the story of all of us who have not yet concluded that some things must be done by someone. Kim Sang-kyung plays a character who lost his wife due to an unknown lung disease, and his son's life is also in danger

The film tells the story of the events that occur after the sister disappears without a trace after the two sisters struggle to move into an apartment. The elder sister "Joo-young" (played by Lee Seon-bin) and her younger sister's boyfriend "Ki-hoon" (played by Kim Min-seok) embark on an incredibly terrifying story while searching for the true identity of the noise and her sister in the apartment