The year is 1850 and Great Britain is flourishing, thanks to the Royal Society of the Esoteric Arts. When a new mage is discovered, Royal Society elites descend like buzzards to snatch up a new apprentice. Talented mages are bought from their families at a tremendous price, while weak mages are snapped up for a pittance. For a lower middle class family like the Gunns, the loss of a son can be disastrous, so when seemingly magical incidents begin cropping up at home, they fear for their Archie's life and their own livelihoods.

But Archie Gunn isn't a talented mage. His sister Charlotte is, and to prevent her brother from being imprisoned for false reporting she combines her powers with his to make him seem a better prospect. However, maintaining the charade will mean masquerading as Archie's assistant, and delaying or destroying her own plans for marriage.

When she discovers a nefarious plot by the sinister Doctor Ledbetter, Charlotte must use all her cunning and guile to protect her family, her secret and her city.