Yoon-hee and Jung-hyun depart on a road trip to the countryside to celebrate their first anniversary. While savoring their time together, they meet a stranger named M. To their surprise, M shows up every destination the couple arrives. He interrupts their time alone as he continues to harass them at the most unexpected moments. The couple later learns that M's a serial killer. They tried to flee but failed, and Jung-hyun is faced with a decision he may regret for the rest of his life...
(source: DVD)
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