Maybe you were drinking it up after your last adventure. Or still on your way back to town. Perhaps you were meditating on the day's spells. Or it could be that you'd just finished your morning prayers. You might have been sharpening your blade. Or keeping watch. Or just sitting down to dinner.
Whatever you were doing, you're not doing it any longer. In a flash of light, the world vanished. And when the light was gone, you found yourself in complete darkness, on the stone floor of a cold, empty room, and with nothing more than the clothes on your back. But are you alone?