A high school boy falls off of the top of a building and lapses into a coma. A detective and his school teacher attempt to get to the bottom of the incident.
Trailer
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![[Nobody KnowsㅣTeaser Trailer] "We might find a body if we dig up there, Young Jin"](https://img.youtube.com/vi/c4lGanLvmcE/hqdefault.jpg)
