you're a death eater. You have been questioning the Dark Lord's ideals a lot lately, and have been seriously considering switching sides.

you decided to go for a late night walk to clear your mind and think things over

suddenly, someone apparates behind you. You spin around when you hear the "crack!" only to see Order member, Sirius Black

you are about to say something but before you can, he knocks you out with a stun charm

you wake up God knows how much later, tied to a chair in the living room of Grimmauld Place (the Order of the Phoenix HQ)

you look around and see half of the Order sitting in the living room conversing. They don't seem to notice that you have awoken, yet.