What Is?

A man in period clothing lifts and spins a woman in a red dress across a dimly lit, candle-lit room with ornate furnishings. The sequence continues with a close-up of a woman in a veil, then a woman in a light dress holding a candle, followed by a group of women reacting with distress, a man standing over a fallen woman, and finally a view of a room where people are gathered, some lying on the floor.