In 1891 a mine collapsed into itself. What was the dark substance found 666 feet underground? During the final days of the Gold Rush, one mining company in Colorado pulled up radioactive uranium, and then the mine then collapsed in on itself. Legends sprung up about the mine being cursed or even haunted. Now the Frontier is closed, the gold and silver mines have dried up. The country is becoming "civilized," and yet, in one stretch of the Rocky Mountains, a terrifying, new kind of violence is suddenly emerging. Random killings. People going mad and murdering neighbors, classmates without real cause. When a schoolboy kills his teacher with a hatchet, a famous federal marshal named Azrael William Holt is called in to investigate the killings. What he-and a brilliant young geologist-uncover is stranger and more horrifying than anything they could have ever imagined. Blending modern horror, historical fact and Western lore, two-time Eisner Award winning author Scott Snyder and veteran illustrator Dan Panosian have created a uniquely terrifying graphic novel thriller with Canary.