After losing her beloved fiancé in an accident three years earlier, Lady Petra Forsyth announces in front of London’s loosest lips that she will never marry. A woman of independent means, Petra sees no reason to cede her wealth and freedom to any man now that the love of her life is gone. Instead, she plans to continue enjoying the best of society without any expectations. But when ballroom gossip suggests that a longtime friend has died of a fit due to her “melancholia” while in the care of a questionable physician, Petra vows to use her status to dig deeper --- uncovering a private asylum where men pay to have their wives and daughters locked away, or worse. Just as Petra has reason to believe her friend is alive, a shocking murder proves that more danger is afoot than she thought.