In a 'fantasy and reality story', the believability of the blend is key. Even though it's a mix of two different concepts, it has to seem somewhat possible. For instance, if a character travels to a world of talking animals, there should be some rules or explanations that make it not completely absurd. The conflict is also important. The conflict often arises from the clash between the real - world values and the fantasy - world values. For example, in a story where a real - world detective enters a world of vampires, his sense of justice from the real world might be at odds with the vampire's code of survival. And finally, the resolution should somehow tie the two worlds together, whether it's the character bringing a new understanding from the fantasy world back to the real world or vice versa.