Edinburgh has a unique history, darker and more unexpected than you might imagine. Fortunately, it also has a set of graveyards to match. Ancient, modern, beautiful, haunted - they are the perfect reflection of the city's amazing past with astonishing stories of their own. Greyfriars Graveyard alone was instrumental in the creation of Darwin's Evolutionary Theory, Mary Shelley's Frankenstein, Christmas celebrations and Cats: The Musical. Black Markers explores each cemetery, creating a fascinating patchwork of tales that builds an intriguing picture of Edinburgh through the centuries.