Every call means a death. An act of crime. Every call leads to a body, leads to another case to be solve. The thing is, this world provides too many ways to die, too many scenarios, manipulation and too many smart people. Will this crime lab led by Jongin and his crew managed to keep up with the demanding calls and the falling bodies?   Everything boils down to one single question for every case. Who's the killer?  

The relationship has ended, but the complicated feelings haven't.