The story is about a man who has 2 identities which is one for undercover and the other for normal life. But there is an incident where it leads to his family and He must protect both identities and that's where the story becomes more interesting since his family didn't know his undercover identity. Not only that, but He must fight the blue collar that has big authority to use their power for bad things such as corruption in the nation itself.

There is a lot of blood and action in this series so it will be enjoyed by those who like it.

Overall it's a good series.