Voice (2017)

The man who Kwon Joo bumped into in the stairway was Dong Bang Min. He threatens Kwon Joo with a knife. Fortunately, Derek and Dae Sik arrive to save Kwon Joo. Dong Bang Min soon gets released thanks to the connection between the Commissioner General and his grandfather, the head of Sonang Village. Meanwhile, Kwon Joo and Derek find out more about Joo Bum Tae from his schoolmate. And they also hear about a kidnapper who is quite short.