The Piper (2015)

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Shortly after the Korean War, a man and his son, Woo Ryong and Young Nam, arrive in an isolated mountain village looking for work in order to make enough money to continue their journey to Seoul. Against the chief's better judgment, Woo Ryong is allowed to do odd jobs and soon realizes the village suffers a major rat infestation. Like a mid-century Pied Piper, he makes a deal with the chief to rid the town of the rats but the time comes to collect his fee and leave, the chief double-crosses the father and son. Vowing revenge, he lures the rats back, fulfilling an old prophecy that brings horror to the village.