The sixth medieval mystery featuring physician Kathryn Swinbrooke.
A violent past haunts Sir Walter Maltravers of Ingoldby Hall in Canterbury. Decades before the War of the Roses, he served in the fanatical bodyguard of Constantine XI Palaeologus, the last Byzantine emperor. But instead of defending the emperor to his death, Maltravers fled, taking with him the Lacrima Christi - a holy relic of incalculable value. When the Lacrima Christi disappears from Canterbury's Franciscan monastery, Sir Walter fears he is being tracked down by the emperor's vengeful loyalists. Days later, Maltravers's head is found impaled on a pole. Apothecary Kathryn Swinbrooke and her fianc e, Colum Murtagh, is called to investigate the crime. As the investigation begins, it becomes clear that all was not as it seemed within the cosy confines of Ingoldby Hall. The death toll is mounting, and if Swinbrooke and Murtagh don't nail down the killer - or killers - soon, they could be next.