The Thief who stole the Moon [The Secret of Moonacre Valley Fanfiction]

Legend foretells of two families: the de Noirs and Merryweathers, both plagued by a curse forged in blood. It, too, foretells of a cleansing: the bloodred dawning of ancient pandemonium that will stir from the bowels of the Earth, purging Moonacre Valley of the pride that has haunted its people. With the rise of the five-thousandth moon, the land will descend into discord and ruin.
The only thing that can save them: the return of the Moon Princess. The girl who could change the fate of the land and prevent its destruction by seeking out the Moon Pearls.
This may be a tall order.
Lysandra Heliotrope is a self-confessed criminal who disturbs the London streets with her gang of misfits, the Sons of Loki. Tragedy strikes the Merryweather family and the criminal is whisked away to the countryside under the care of her neurotic mother, Miss Heliotrope, and her now-orphaned charge, Maria Merryweather.
When questions are raised and legends discovered, Lyra must help Maria unite the families with the Pearls of Legend. But they are hindered by the de Noirs, who send a mysterious bandit to beguile Lyra with her own tricks, and are discouraged by Maria's handsome uncle, Sir Benjamin.
Rescuing the valley might not be possible when Lyra's heart is put on the line...

[The characters and some of the other minutiae are property of Velvet Octopus film company, but the rest are original concepts of my own devising.]