While their mother is away from home, the two young sisters are intrigued by the post-it that their mother put in front of the refrigerator.
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A gym teacher and his female student look for her missing friend. But as they investigate, they find that her disappearance is a part of a larger conspiracy.
Jang-soo is a judo instructor who is indifferent to everyone but his daughter. One day he realizes he can see Tae-jin, a ghost who used to be a devoted police officer. Tae-jin asks Jang-soo to help solve the case that took his life away from him.
Soo-kyung works as a reporter. She has an older brother, Sung-ho, and younger sister, Joo-mi. She thinks of her two siblings as burdens. One day, Nak appears in front of them. He is their youngest sibling.
Character triumphs over adversity and temptation when a young African-American man is unexpectedly thrust onto the streets of Harlem.
