Knock Twice

For three years, Detective Min Yoongi has been hunting the same killer.

For three years, the killer has been one step ahead.

Six victims.

Six crime scenes so clean and deliberate they look like art.

Yoongi has given everything to this case. His sleep, his relationships, his peace of mind. He knows every victim by name. He has memorized every detail of every crime scene.

He has spent three years being absolutely certain he will catch this person.

What he is not certain about are the nights he cannot remember.

The notebook he keeps hidden in his apartment is full of dates and times he cannot account for. Hours that disappear and return him somewhere he does not remember choosing to go. He tells himself it is the exhaustion.

He tells himself it means nothing.

His neighbour across the hall is not so sure.

Seo Jiah has lived next to him long enough to notice that some nights, the man who walks through that door is not the same man who left.

Same face, same hands but completely different eyes.

She does not know what that means yet. She is not sure she wants to.

When the killer sets his sights on her, everything Yoongi thought he knew about this case begins to collapse.

Because the answer has been there all along.

And it is far more terrifying than anything he ever imagined finding.

#psychologicalhorror
#serialkiller
#yoongiff
#agustd
#slowburn
#detectiveau