Mi-ja, who has been taking care of a retired teacher, Ms. Park, invites several of her former students to her house 16 years after their graduation. Since the end of her teaching career, Park has been residing in the countryside, suffering from an illness while an ex-student, the kind and pretty Mi-ja cares for her.

A struggling director makes a desperate bid to dig into the urban legend about a film shot by a ghost, at the risk of her own life.

Having never been involved in a long-term relationship, Ha-yoon was hoping that her current boyfriend, Nam Tae-ryeon, would be the one to change all of that. But when he announces he wants to break up with her before they even reach their 100th day, Ha-yoon refuses to accept her fate without a fight. Determined to make this relationship last, Ha Yoon suggests a month-long “break-up grace period” in which she and Tae-ryeon are allowed to spend as much time apart as they want, without calling things off completely. Agreeing to her terms, Tae-ryeon and Ha-yoon draw up a contract in which the terms of their grace period are clearly stated. While Tae-ryeon goes about his life, Ha-yoon somehow finds herself signing an entirely different contract with her best friend and college colleague, Kang-jin.