Edinburgh, 1889. The Scottish Play is coming home. But before the darlings of London theater--Henry Irving and Ellen Terry--take their acclaimed Macbeth to the Edinburgh stage, terror treads the boards: A grisly message is found smeared across the cobbles in blood, foretelling someone's demise. As the bloody prophecies continue to come to fruition, Edinburgh's own beloved pair of detectives--"Nine-Nails" McGray and Inspector Ian Frey--enter the scene....