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Soon after getting a new phone, a woman notices strange things starting to happen. When she investigates, she discovers that everyone who has had her phone number before her has died suddenly and mysteriously.
Byung-ki is a clumsy village policeman who helps out with trivial tasks like distributing promotional papers, though he dreams of fighting evil. One day, he runs into Min-kyong, an employee at the neighborhood bowling alley, and falls for her at first sight. However, his attempts to woo her go unnoticed. Meanwhile, Sang-doo, the boss of the local gang—with whom Byung-ki harbors a boyhood grudge—also swoons over Min-kyong and vows to take her virginity on Christmas Eve.
A group of friends on a trek in a dark forest begin to die one by one.
