illegal or black-market transaction

Exploration Stage: Heirs' Villa
From: Robert Luxmore
Description: The play has finally come to a close! Maybe the play will reveal some clues that will help us in our investigation? Now, Sophia, dressed as a shepherd, is leading a flock of white lambs in a song... Hey! Did you see that? The lambs are changing color!
Completed: Yes, the lambs on the stage have changed color from white to black. They were white when we received them...but something strange is happening around the female shepherd. Keep an eye on her.