A string of murders takes place. A beautiful tattooist becomes involved in the case.
Tattooist Soo Na has a strange habit of putting their hand on a man’s pants and checking something while dancing with him. One day Ji Soon comes up to her, requesting a tattoo on his back. He repeatedly comes and orders her tattoo of Medusa. The day his tattoo is finally completed, Soo Na sees Ji Soon rapeand kill a girl, and she instinctively noticed that there are the same amount of victims with snakes on Ji Soon’s back.