Mr. Yoo is the section chief of one of the worst performing sections in the company. One day while working late, he is chased by several men and is then hit by a truck. He is the 4th victim of the strange incidents that has been occurring at the company that resulted in 3 deaths. However, all of the victims had one thing in common other than working in the same company, which was that all of them had a music box given to them as a gift.
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