Kate and Thomas have barely escaped the evil sorcerer Demurral, and are sailing to London to make a fresh start. But someone knows they are coming, and is lying in wait to lure them into the darkest heart of the city.

Obadiah Demurral, vicar of the 17th Century Yorkshire parish Ravenscar, is also a sorcerer seeking to control the ultimate power of the universe. When Raphah, a young African boy, is shipwrecked on the coast during a strange storm on a cold October evening, he brings with him the power to challenge Obadiah.

London is living through one of its darkest times: a comet has just missed the Earth, leaving the city in chaos and the people fearing an apocalypse. Tersias, a blind boy oracle, has predicted the comet and sees visions of the future through the darkness. As Tersias' powers strengthen, people who seek to use them are drawn from the shadows: Malachi, a charlatan magician; Jonah, a desperate highwayman; and Lord Malpas, a keeper of mysterious powers.

Dr Sabian Blake possesses the Nemorensis, an ancient book that holds the secrets of the universe. Leafing through it, he reads a mysterious inscription: "Wormwood...the bright star shall fall from the sky...and many will die from its bitterness." Deciphering the prophecy could prove the key to saving London from a catastrophic fate. But there are others interested in the Nemorensis, too - for more sinister reasons.

Shadowmancer takes you into a world of superstition, magic, and witchcraft where nothing can be taken for granted, and the ultimate sacrifice might even be life itself.

Panic fills the streets of 1756 London when the earth suddenly starts lurching and spinning, and the city is left in total darkness. Is the end of the world at hand?

Vicar Obadiah Demurral isn't satisfied running the affairs of his village, now he wants to control the world. And if his plan works, he will obtain a weapon so powerful, even God and his angels will fall down at his feet. Demurral will stop at nothing, and as a shadowmancer (a sorcerer who speaks to the dead), he even commands restless souls to do his bidding.