The orders had been given, backed up with flattering words and heavy coins. The supplies had been provided, hoarded carefully away in a safe place until the time was right. Tonight was that time. The intruder was barefoot, soundless as bottles were opened at random, something poured in before they were carefully closed up again, placed back exactly where they had been.
The intruder had been told what the additive did, but didn't entirely believe it. Changing someone from male to female or female to male? Even for just half a day! That was magic, not something that could just be added to a drink! Right? Well, they would find out, come tomorrow.