Sheffield's beautiful Botanical Gardens - an oasis of peace in a world filled with sorrow, confusion and pain. And then, one morning, a body is found in the Gardens. A young woman, dead from a stab wound, buried in a quiet corner.

Police quickly determine that the body's been there for months. It would have gone undiscovered for years - but someone just sneaked into the Gardens and dug it up. Who is the victim? Who killed her and hid her body? Who dug her up? And who left a macabre marker on the body?

In his quest to find her murderer, DS Adam Tyler will find himself drawn into the secretive world of nighthawkers: treasure-hunters who operate under cover of darkness, seeking the lost and valuable . . . and willing to kill to keep what they find.