Sheffield's Botanical Gardens is an oasis of peace - until one morning when the body of a young woman is found there, buried in a quiet corner. Police determine that she's been there for months and would have gone undiscovered for years - except someone returned in the dead of night to dig her up.

DS Adam Tyler and his team have many questions to answer - who is the victim? Who killed her and hid her body? And who dug her up?

Tyler's investigation draws him 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.