The story might be slow and goes little by little, however everything was executed right and nothing left unsolved. The slow-burn yet proper pacing reminds me of Flower of Evil and Beyond Evil. This kdrama definitely belongs up there with them.

Props to the writer for the amazing story. Like the title "Connection", everything that happened in this series are all connected. From the start all the way to the end. Everything is tied to the past of their friendship, connected again in present time.

I can't stop get amazed by Ji Sung's acting thorough the series. His acting is always excellent and overly done in a perfect manner. I recommend watching him in The Devil Judge, it has similar story (Thriller - Mystery - Revenge) to this kdrama - only faster and wilder.

Not only Ji Sung's, everyone's acting were also great and has their own distinct appearance. Especially the ones who casually appears from episode to episode, no generic or bland acting from them, everyone serves their characters right.