Baekhyun's first time in the US goes horribly wrong when his stalker follows him. One night while going through his mail he comes across a letter from tbe stalker. His first instinct is to call the police and when they get there they are there to stay. One of them causing Baekhyun to feel a little thump in his chest.
nana is a renowned serial killer in seoul, korea. nobody has caught them, they don't even know who it could possibly be. that was until detective in training lee jeno gives the case a try.