The Diviner: Part One: The Killer, the Detective, and the Man in the Black Hat (English Edition)

A man enters a coffee shop early in the morning. He takes his seat and soon after, a trio of robbers enter. A scene of blood and carnage soon follows. The witnesses remember very little of the man and have no idea what happened to him.
Who is this man?
Will the detective find the answers he seeks?
Who is the Diviner?
These are all things the Man in the Black Hat can answer, but who is he? Why does he seek the Diviner?
Are you prepared to begin the journey into his world?