This really had the potential as a reviewer stated but they really dropped the ball. With the title and the synopsis I really went in with high expectations. I was expecting it to be something along the lines as Day and Night and since I was so impressed with that I thought this would be good as well- is was not. There was a different case every 4 episodes and that's fine but there was no real connection to them and the 10 deadly sins as I thought they would be.
Hua Long has some issues from his past that we see in flashbacks but it never gets resolved.
Su Mei also has some issues as well but they never come up.
There is this weird forced romance between Su Mei and Hua Long that really makes no sense.
Bao Zhan is the annoying know-it-all.
Everyone else is kinda just "there" and they get no shine.

I'm not sure if this counts as a spoiler but the show ends on a cliffhanger...
And it's because of that, I would not recommend this.