Cambridgeshire, September 1813: Detective Stephen Lavender and Constable Ned Woods are lured to an isolated estate in the deadly marshland surrounding Ely, to investigate a murder.



But nothing is as it seems at the mysterious Willow Marsh Manor. They soon realize they've come across this feuding family before—in the direst of circumstances. With no dead body and no sign of the woman who summoned them, Woods fears someone has planned a murderous revenge.



Meanwhile, Lavender dreads the disclosure of his greatest secret. A secret that, if revealed, will destroy both his career—and his relationship with Woods. Haunted by ghosts from the past, Lavender and Woods must tread a careful path through this watery and dangerous terrain in order to solve one of the most perplexing mysteries of their career.