Chang-Hoon Lee

In 1976 on a remote island, schoolteacher Eun-young wants to take her students on a field trip to a cookie factory in Seoul. Even though the parents don't like the idea, Eun-young succeeds in taking them. But once they arrive in the complicated city, students become fascinated with "high-tech'' bicycles and get lost. (hancinema.net)

Young Hee has lead a comfortable and financially secure life as an upper middle class housewife. When her husband passes unexpectedly after his business fails, Young Hee must find a way to support herself and her four children. (imdb)

M is the nickname of the soul of an aborted child that has the purpose to seek revenge on the people who would not allow him to be born. M entered into the body of the young girl, Park Ma Ri, and from this moment her life has changed and she cannot control herself anymore.