19th-c Scotland. Hestan island, marooned in the Solway Firth, tethered to the mainland at low tide by a causeway called The Rack. Home to two men quietly living out their lives, until a boy is almost crushed to death in their tiny copper mine, when their shared pasts begin to unravel.

Over at Balcary House, Brogar Finn and Sholto McKay arrive and soon become involved in the affairs on Hestan. As truths are revealed we are taken back through the bloody wars of Crimea and the lands of the Tartars and terrible secrets are laid bare.

The third in acclaimed wirter Clio Gray's Scottish Mysteries, Hidden Pasts explores the history of a little known part of Scotland, and provides a compelling tale of how small events can echo down the years, with deadly consequences involving murder, lost libraries, regret & revenge.