So where do you draw the line between being "inspired" by a story or by actually stealing an idea/concept/character? For example, I have a favorite author, Jim Butcher. Basically the main character is a "wizard" living in Chicago who interacts with demons, vampires, etc. A submain character is a female police consultant. If I were to take a similar plot - a wizard living in a big city with a female police consultant that deals with vampires, demons, werewolves, etc, would that be considered, in your opinion, inspiration or stealing? I mean, the concept isn't original, but the setting is. Perhaps a bit of the "character" of the character as well. Thoughts? Opinions?