It tells the story of the demons hunters called Counters, whose goal is to capture Evil Spirits that have return to earth in pursuit of Eternal Life.

It is the somewhat typical series that brings together several elements, such as endearing characters and forming a team that becomes a family. We cannot help but root for the characters, like So Moon, who is the new addition to the Counters, it is a pure and innocent young man, who has two adorable grandparents and a lively trauma left by the death of his parents. He is our main character.
Then, Do Ha Na a mysterious but sensitive young women, who does not hesitate to fight for those she loves.
Ga Mo Tak, who was a police officer but lost his memory seven years ago after an accident, strangely the same day when So Moon's father and mother died, who were also police officers. Ga Mo Tak becomes So Moon’s mentor.
Chu Mae Ok is the maternal and protective figure of the group, she is ready to do anything for them, even to sacrificed her own life.
And finally, Choi Jang Mool, who comes and helps the other Counters from time to time, he is in charge of all of the Counters' expenses.

The series comes down to politicians who use their power to crush anyone who puts themselves in their path, they do not hesitate to corrupt and kill, using the worst methods, even going so far as to poison water reserves that the population use without the slightest care of killing them.
The series also take a look at the bullying done in schools, with the bullies which are protected instead of the victims, generally because they have highly placed parents.
And then the heart of the series, the Evils Spirit that the Counters fight, including one in particular which is at the origin of many pains, losses and trauma of several characters.

The script is not complicated but it is well put together, it gives us action, humorous, touching, sad, painful moments, it is a complete package. On the other hand, I would be honest, a lot of plots are predictable and scenes that I have just skipped, so there is this modern cheesy element but in the end it is good.

In summary, it is everything that people are craving for, I am more curious to see season 2, I want to see more sides and depth to our characters, even new faces, I want to see new challenges.

So a solid and entertaining first season, good production and script, and acting (even though nobody really stood out among them - yet, I hope next season will change that), and I'm waiting for more depth for season 2.