In the year 1836 Britain, while notionally a monarchy, is controlled by a group of powerful sorceresses. As much as they try, they are unable to completely suppress technology and the growing industrial revolution.
Sixteen year old Milo Whitlaw is summonded to London to stay with his mother's cousin, the Duke of Sussex, who says the boy needs to learn more about the world than he will see in his quiet country house. Still struggling to deal with his sister's suicide and his father's increasing distance, Milo relishes the chance. Accompanied by his adopted brother, Tobin, he finds himself thrown into a city beyond his imagination. But under the surface a struggle for power is brewing and the currents threaten to separate the two brothers in every way.