"There's something there - in her dreams, Jongdae, and I don't have a good feeling about it." 

"You never get scared." 

"I mean it...I have a very, very bad feeling about it. Haven't you ever heard of the phrase, that the past is never where you think you left it?" 

"This isn't the same as yours, Minseok. You've walked away from yours." Then he added, "Long ago." 

Minseok and Jongdae have long since opened their own agency after completing a two-year college seminar at the police academy. What they do is beyond normal. When the troubled have nowhere to turn they begin seeking Minseok, code name: Xiumin, for help. As he slips into their dreams to investigate and save the dreamers, Jongdae, code name: Chen, Minseok's partner and psychic, stays on standby if anything is to turn haywire. Chancing upon a troubled woman during one of their cases, Minseok is forcibly chased from her dreams, but every time he goes back into her mind he gets further into the darkness and just what might break his mentality. Puzzles come into order and in due time, if before they solve anything, Jongdae will become the next victim of an acclaimed murderer. 

***Characters are mine, this is all from my imagination. I'm only borrowing images and names, no other intention.

***No romance in this one, you've been warned.