This is a continuation of Season 1 and continues into Season 2. So the story is indeed a continuation.
Honestly, I really like the concept of this bodyguard theme plus the investigation and assistance from the police. The story is good, a bit heavy too and highly recommended to watch, for those who want to watch it please because I will not give spoilers. As for the story, it's really ok and also the addition of a sequel in the second season, as well as camera shooting and cinematography are also really cool, especially about the fight between the two of them, that made me really like this drama.