Death is stalking The City. From out of the catacombs, a deadly monster has arisen. Unfortunately for alchemist's apprentice Remy the Rat Boy, his master is away and it's up to Remy to discover the nature of the monster and put an end to its killing rampage. His search for answers takes him high into the elegant chambers of the city's elite, and down into long forgotten ruins, into depths untraveled and unimagined for centuries. Lost in the ancient ruins with only ghosts and creatures of the darkness for companionship, Remy must use every ounce of wit and conjure every scrap of magic at his disposal in order to survive the labyrinth and save The City from its shadow self.