Three females have all been murdered in the time period of three weeks. Though there was something about these murders that had Min-Seok extremely concerned about.

The three girls that were murdered he had been very close with. 

Seo-Young, his best friend since high school. 
Soo-Yeon, the closest person he has to a sister.
Ju-Hee, a girl he had rescused while working on a case. 

Their next target? Min-Seok's girlfriend, Tae-Hyun.

What could the killer want with Min-Seok that has lead him to releasing people close to him? This is what Min-Seok must figure out before the killer is able to release Tae-Hyun. Will Min-Seok be able to find out why before the Master of Disguise can take action?