In the city of Northwell where steam and magic intersect, Aidan Reed makes a living by trading secrets on an ancient silver coin. He took on odd jobs like finding cats and dogs, and occasionally solved some unseemly troubles for the nobles. Until one rainy night, a visitor wrapped in a black cloak brought a seemingly simple missing person commission, but actually dragged Aidan into the vortex of conspiracy spanning the three major families. When the clues in the disappearance case pointed to the "Dark Moon Fire" that burned half of downtown twenty years ago, Aidan discovered that the silver coin in his hand that always got hot on full-moon nights was inextricably linked to the fire.