London, 1812. At a fashionable address in leafy Mayfair, a far cry from Detective Stephen Lavender's usual haunts, a man is found dead in his room. He has been brutally stabbed, but the door is locked from the inside and the weapon is missing. The deceased is David MacAdam, an Essex businessman with expensive tastes. As Lavender and Constable Ned Woods travel between London and Chelmsford seeking to understand MacAdam's final hours and unearth the grisly truth, they uncover a tangled web of deceit behind his stylish facade. The unusual circumstances of MacAdam's death are nothing compared to the shady nature of his life and it seems the house on Park Lane is at the heart of a dark conspiracy. But when a second body turns up, everything they think they've learned is thrown into doubt. Can Lavender and Woods find out who's behind these shocking murders before more lives are ruined?

London, 1812: Treacherous gangs roam the capital, and not even the Palace of Westminster is safe. When Detective Stephen Lavender is called in to investigate a highway robbery and a cold-blooded murder, both the cases take a dangerous and disturbing personal twist. And when Lavender's trusted deputy, Constable Ned Woods, finds a mysterious severed foot washed up on Greenwich Beach, they soon realise that these ancient bones are more sinister than they first appeared. With Bow Street Police Office undermanned and in disarray, it will take all of Lavender and Woods's wit and skill-and some help from Lavender's spirited wife, Magdalena-to unmask the fiend behind the mayhem, restore peace and justice to the beleaguered city and solve the tragic mystery of the severed foot. But will they do so in time to foil a plot that threatens to plunge the country into chaos?