London, 1665. Hidden within the growing pile of corpses in his churchyard, Rector Symon Patrick discovers a victim of the pestilence unlike any he has seen before: a young woman with a shorn head, covered in burns, and with pieces of twine delicately tied around each wrist and ankle. Desperate to discover the culprit, Symon joins a society of eccentric medical men who have gathered to find a cure for the plague. Someone is performing terrible experiments upon the dying, hiding their bodies amongst the hundreds that fill the death carts. Only Penelope - a new and mysterious addition to Symon's household - may have the skill to find the killer. Far more than what she appears, she is already on the hunt. But the dark presence that enters the houses of the sick will not stop, and has no mercy... Like new minus small tear of book jacket, see photo