You awake to find yourself laying on a dingy wood floor, the morning sunlight illuminating the room around you. The tavern. Yes, you remember staying in a tavern. This must be the tavern. As you move to stand up the world shifts a little bit. Too much ale? You don't remember having any ale. A picture flashes in your mind of a small glass vial with something in it, a liquid darker than obsidian.
You feel something on your hand, something wet. You look to your hand and see it coated in blood. You follow the puddle on the ground and see it leads to one of the townsfolk, now nearly decapitated. The world is aglow in a haze as you stagger up to your feet. You see the room is just littered with bodies. All of them dead. Gruesomely. The walls, tables, and floor are covered in blood. The haze is relentless, but your heart is also racing.
As you look around you see three other figures rising out of the sea of corpses. What happened here last night? You remember the strange summons that brought you to this town, the rooms reserved for you in this tavern, after that, just the haze.
[ GM: Feel free to use this to describe not only how your character reacts to the situation and the others, but also if you want to intro what your character would look like. I'll try and keep these GM suggestions to a minimum. ]