Madame Sosostris & the festival for the broken-hearted

Viv, who's in the House of Lords, had the idea for the festival on the twentieth anniversary of the day her first husband left her. Six months later, crowds descend on the grounds of a dreamlike chateau in the South of France, avidly awaiting the experience of a lifetime, Viv's inaugural Festival for the Broken-Hearted. Everyone is in fancy dress. No one knows who anyone is. They wander the beautiful woods with just one night to change everything...