for several nights you suddenly start acting strange at midnight. You will start to laugh and smile like a crazy demon willing to kill or torture someone without reason. It is like your body carves for it.

But you don't...

You have been filming what your body do at night for weeks now and today you decide to go to a priest and tell them everything

You are on your way walking to the church now

(Are you going to befriend the demon? Or are you going to defeat it?)