Park Bo-young

Identical twin sisters with opposite lives - one a former athlete living freely, the other a corporate perfectionist switch places with each other, despite their contrasting personalities.

A jaded film critic reunites with an aspiring director after years apart due to a mysterious event. Their reunion triggers buried memories and emotions, leading them to confront their shared past.

A sickly girl Ju-ran transfers to a new sanatorium boarding school to regain health. But she discovers that students are disappearing and notices abnormal changes happening to her body. She tries to discover what secret is hidden.