With a sudden 'click,' the entire mansion was plunged into darkness.
Even the light from the fireplace vanished, and the sound of footsteps on the thick carpet echoed unusually loudly.

Someone appeared with a candle, and following that faint light, we gathered one by one in the lobby.
The chandelier hung lifelessly from the ceiling, and dark shadows were cast on the wide staircase and walls.

There were five of us.
...Clearly, there should have been six.

"...Isn't that person in their room?"
"I checked their room, and they weren't there."