When night falls, we find peace in the knowledge that daytime will return soon, and vice versa. But what if the world was split: daytime and night are two different, coexistent worlds, each with it's own laws and rules. At dawn and sunset, our soul switches to inhabit our other being, our 'twin'.
What if dragon-sightings and evidence of such was treated with the same skepticism and mockery as modern UFO sightings? More for a low magic world where dragons 'dont' exist.