London, 1783. Orphan Cirrus Flux is being watched. Merciless villains are conniving to steal the world's most divine power-The Breath of God-which they believe Cirrus has inherited. Now he faces a perilous journey through the dirty backstreets of the city as a sinister mesmerist, a tiny man with an all-seeing eye, and a skull-collecting scoundrel pursue him. Cirrus must escape them, but he'll need to trust some unlikely allies if he hopes to thwart his foes . . . and survive a grand and terrifying showdown.