Muhan Company(2016)

Muhan Company is a Korean drama about a section chief named Mr. Yoo who becomes the fourth victim of a deadly conspiracy unfolding within his workplace. After being hit by a truck while fleeing unknown assailants, Yoo survives an attack that has already claimed three colleagues' lives. The investigation reveals a chilling pattern: each victim received an identical music box as a gift before their deaths. As Yoo recovers, he must uncover who is behind the sinister plot and what the mysterious music boxes mean. The series blends workplace thriller elements with supernatural mystery as Yoo races to identify the killer before striking again.