As the sun rises, a young woman – Samantha Seabrook – is found drowned in the ornamental fountain of a deserted Cambridge courtyard, the only clue – an antique silver chain wound tightly around her throat.

It’s Tara Thorpe’s job to discover what happened to Miss Seabrook – but the case becomes personal when she learns that Samantha had been receiving death threats… rather like the one that landed on Tara’s doorstep the night the woman died.

Together with Detective Inspector Garstin Blake, Tara tracks the killer to the dank and dangerous fens on the outskirts of the city. But there’s something Tara can’t quite admit to Blake about her past – and it could make all the difference to whether they live... or die.