At some point, I hope, your characters seek something that will help fulfill a goal, or quest, or what have you. In my case, my characters are seeking a member of their group who’s been taken. Stakes are always high in such situations, and it gives a writer the challenge of laying clues that readers MUST be able to see without feeling obvious, for characters to drop verbal clues without sounding like they’re being dropped. It’s a delicate balance, not often achieved in a single draft. Still, that doesn’t mean we can’t try, and if a little bit of mysterious air can help, all the better. Let Alexandre Desplat’s music from the final Harry Potter story help provide the necessary ambiance for the mystery woven in your plot.