The Dowager Countess of Pembroke is missing!

While Wolf contemplates whether or not to continue investigating, it seems that the dowager has taken matters into her own hands and is investigating a case independently. But why has she gone missing from her home for two nights, and what mischief has she gotten herself into? Tracking down the elderly woman takes Tabitha and Wolf into some of the darkest, most dangerous corners of the city.
What on earth is the exasperating dowager caught up in that she seems to have become entangled with London's prostitutes?