9.5/10 is my rating. This is a 2017 South Korean television drama spanning 40 episodes (~30 minutes). Ji-wook (Chang-wook) male lead. The lead female character is Eun Bong-Hee (Nam Ji-hyun)

About Noh Ji-wook, a prosecutor, and Eun Bong-hee , a prosecutor trainee, and how they work together on a mysterious case involving a sly psychopath murderer They find out how deeply connected they are by their past.

Spoiler ? The standard description really does not do credit to this story. There is a serial killer who taunts the two main characters throughout the entire show. The female lead is framed for a murder she did not commit and it basically destroys her life. There is sizzling chemistry between her and the male lead. Lots of romance and it is filled with suspense. This is now one of my favorites.