First, someone broke in and was killed, then there was a problem with the surveillance footage, followed by a blackout; the castle has its own power plant that provides ample electricity, so blackouts are extremely rare.
Even if they occur, there would usually be advanced notification to prepare.
It couldn't possibly blackout without any reason.
"What on earth is going on?"
In the ground-floor surveillance room, one person furrowed his brow, awakened by someone else's comment; could there still be people left inside the castle who hadn't gotten out?
"Activate all traps inside and outside the castle, open the vents, and use thermal sensors to check all floors; send a few people to check the sixth floor," the Duke ordered upon receiving the news.
