Republican era, around 1930.
Rain is pouring down that fateful night in Jingcheng City. As we watch the good-natured Dr. Chen Yuzhi cycle his way home, seeking shelter under the eaves, we're diving headfirst into a plot full of viscious crimes and interhuman relations.
-It's the moment Chu Ran and Chen Yuzhi step into Jiang Yuelou's life and decide to stay, that we realize that Jiang Yuelou is the unspoken center of the story. -

It didn't take me long to light ten stars, as I got so attached that I might be devoting my first written preview to this drama.

Background music
One of the reasons to call this a classy drama is beautifully drawn tapestry of sound. The show decided upon subtle background music, the original soundtrack composed of very decent melodic ballads and only a couple instrumentals that are very well timed, accompanying sequences quietly, giving more importance to emotions and spoken dialogue. This gives it a pleasant, mature vibe.

Production
Omnium-gatherum summary of everything that caught my eye from episode one.
•Killer and Healer is free from overdrawn sequences and cheesy-slowmotions.
•The cinematography brings in gorgeous shots, developing into beautifully framed sequences here and there.
•As we're situated in the republican era, we get to see tailored suits and beautiful attire. Women are wearing gorgeous dresses and every single citizen that we see roaming the streets of Jingcheng has their own, beautiful outfit of the day. Even upon close proximity, the costumes look thoroughly authentic and high in quality.
•The drama leads us through a collection of sets that are very well thought through (however wow, it is cold!).

Plot & Characters
The plot itself is relatively solid. Various other points make up for the ones lost to a common storyline. The plot isn't particularly new, yet unravels a beautiful story of faith. It's told by steadfast characters, and also introduces a brave and clever female lead, Chu Ran, that wonderfully concludes the trio alongside Police-Chief Jiang Yuelou and Doctor Chen Yuzhi.
Every other character that gets introduced throughout the story isn't any less holistic and just as vital.
While the storyline itself contains alot of criminal action, it pays special attention to interhuman relations.
With a strong focus on the steadying relationship between Jiang Yuelou and Chen Yuzhi, it opens up on more then just bringing peace to Jingcheng City. We follow Jiang Yuelou, as he learns to regain his trust in the people around him and finds his safe-place within Chen Yuzhi, who meets him with unconditional faith. With every episode, the picture grows bigger, as we slowly get to know Jiang Yuelou and Chen Yuzhi as a person and start to sympathize with the characters introduced to us.

The ending: The ending comes around very unexpected. Yes, initially, it is bad and very tragic. This might be a spoiler. However, the ending lies in your power. For a happy ending, hop out from ep 37 at timestamp 29:15 and click here for a seperately uploaded end
https://youtu.be/FC696_RYeEw

Acting
Completing this with the strongest asset.
It's the actor itself that eventually shapes the character, forms it and introduces it to the audience. The characters I see are consistent and compelling, each drawn with their own unique features. The acting is impressive, the whole cast stunning. Every single actor within Killer&Healer convinces with performance. The chemistry between the leads grows extremely palpable as they enter each others lives and naturally learn to trust. Eventhough, due to censorship, scenes got shortened (not harming the plot), emotions are portrayed beautifully through micro-expression, faces full of emotions and long lasting glances. So much so that more isn't needed and it lies in the perception of the audience to view their relationship.

This drama is and was a very, very pleasant watch. I would rewatch it all over again. The biggest joy lies within the unfolding, unspoken emotions between the leads and the quirky supporting characters.