An old kidnapping cold case of Grace Waterson is re-opened when a mummified corpse is found in a disused building. A follow-up investigation by Sparks and Simon lead them to Rachel Markham, the widow of a suspected hit-and-run which occurred at the same as the kidnapping. Sparks's former, and now retired, partner Maurice Biederman piles on the pressure on Rachel and he finds a link from her to the nursing home where Grace Waterson was found. But will Sparks get to Maurice before Rachel does?
—Anonymous