London, September 1666. The Great Fire rages through the city, consuming everything in its path. Even the impregnable cathedral of St. Paul's is engulfed in flames and reduced to ruins. Among the crowds watching its destruction is James Marwood, son of a disgraced printer and reluctant government informer. In the aftermath of the fire, a semi-mummified body is discovered in the ashes of St. Paul's, in a tomb that should have been empty. The man's body has been mutilated, and his thumbs have been tied behind his back.

Danger and dissent stalk the streets and taverns of Elizabethan England. The queen’s chief spymaster, Francis Walsingham, and his team of agents must maintain the highest levels of vigilance to ward off Catholic plots and the ever-present threat of invasion. One operative in particular - a young Cambridge undergraduate of humble origins, controversial beliefs and literary genius who goes by the name of Kit Marlowe - is relentless in his pursuit of intelligence for the Crown. 

London, 1782. Desperate for her politician husband to return home from France, Caroline 'Caro' Corsham is already in a state of anxiety when she finds a well-dressed woman mortally wounded in the bowers of the Vauxhall Pleasure Gardens. The Bow Street constables are swift to act, until they discover that the deceased woman was a highly paid prostitute, at which point they cease to care entirely. But Caro has motives of her own for wanting to see justice done and so sets out to solve the crime herself. 

1899, South Africa: As the Boer War rages, Captain Ingo Finch of the Royal Army Medical Corps pieces together casualties at the front. Later, recovering in Cape Town, he is woken by local police. A British officer has been murdered, and an RAMC signature is required for the post-mortem. Shocked by the identity of the victim, the bizarre nature of the crime and what appears a too-convenient resolution, Finch turns detective. He is soon thrust into a perilous maze of espionage and murder. 

Three young girls have been abducted from their homes. The body of one has been found in a shallow grave. The other two are still missing. The murder has shocked everyone in the peaceful city of Delft, and the mayor is desperate to catch the perpetrator before panic can spread any further. With the bitterly cold January weather intensifying, it is doubtful that the other two girls are still alive. But whoever took them is still at large.

Mercia, 788 AD. In the grand Saxon halls of Mercia, King Offa rules with cold ambition. His youngest daughter, Eadburh, is destined for an arranged marriage, but with reckless spirit, her heart is taken by a Welsh prince, a man she can never be matched with and who is quickly and cruelly taken from her. Offa’s Dyke, 2021. In a cottage hidden amongst the misty Welsh hills of Offa’s Dyke, Bea Dalloway is called to help Simon Armstrong, who is searching for peace. Instead he finds himself disturbed by unsettling noises and visions.

1942: a German spy comes ashore on a desolate stretch of Lincolnshire beach. But he is hunted down by a young detective, Richard Prince. The secret services have need of a man like him.... In occupied Europe, Denmark is a hotbed of problems for British intelligence. Rumours of a war-ending weapon being developed by the Germans are rife. Sent to Copenhagen, Prince is soon caught in a deadly game of cat and mouse. Dodging Gestapo agents, SS muscle and the danger of betrayal, his survival - and the war effort - hangs in the balance. 

Frances Howard has beauty and a powerful family - and is the most unhappy creature in the world. Anne Turner has wit and talent - but no stage on which to display them. Little stands between her and the abyss of destitution. When these two very different women meet in the strangest of circumstances, a powerful friendship is sparked. 

Marcus Salvius Magnus, leader of the South Quirinal Crossroads Brotherhood, has long dominated his part of Rome's criminal underworld. From rival gangs and unpaid debts to rigged chariot races and blood feuds - if you have a problem, Magnus is the man to solve it. But while Magnus inhabits the underbelly of the city, his patron, Gaius Vespasius Pollo, moves in a different circle. As a senator, he needs men like Magnus to do his dirty work.... 

August, 1940. On the streets of London, locals watch with growing concern as German fighter planes plague the city’s skyline. But inside the famous Ritz Hotel, the cream of society continues to enjoy all the glamour and comfort that money can buy during wartime - until an anonymous man is discovered with his throat slashed open. Detective Chief Inspector Coburg is called in to investigate, ably assisted by his trusty colleague, Sergeant Lampson. 

Following a personal tragedy, florist Persimmon “Simmy” Brown has moved to the Lake District to be nearer her parents. But her peace is shattered when, at a wedding, the bride's brother is found brutally murdered. As the florist of the wedding and one of the last people to talk to Mark Baxter alive, Simmy gradually becomes involved with the relatives. When events take another sinister turn, Simmy finds herself at the heart of a murder investigation.

William Constable, a physician and astrologer, is summoned to the presence of the Queen’s spymaster, Sir Francis Walsingham. He is charged to assist a renowned Puritan, John Foxe, in uncovering the secrets of a mysterious cabinet containing an astrological chart and coded message. Together, these claim Elizabeth has a hidden, illegitimate child (an “unknowing maid”) who will be declared to the masses and serve as the focus for an invasion. 

God lies defeated, his corpse hidden in the catacombs beneath Mordew. On the surface, the streets of this the sea-battered city are slick with the Living Mud and the half-formed, short-lived creatures it spawns - creatures that die and are swept down from the Merchant Quarter by the brooms of the workers and relentless rains, where they rot in the slums. There, a young boy called Nathan Treeves lives with his parents, eking out a meagre existence by picking treasures from the Living Mud - until one day his mother, desperate and starving, sells him to the mysterious Master of Mordew.

England, 1176. Aelred Barling, esteemed clerk to the justices of King Henry II, is dispatched from the royal court with his young assistant, Hugo Stanton, to investigate a brutal murder in a village outside York. The case appears straightforward. A suspect is under lock and key in the local prison, and the angry villagers are demanding swift justice. But when more bodies are discovered, certainty turns to doubt - and amid the chaos it becomes clear that nobody is above suspicion.

Oxford, 1583. Giordano Bruno, a radical thinker fleeing the Inquisition, is sent undercover to Oxford to expose a Catholic conspiracy against Queen Elizabeth. But he has his own secret mission at the University, which must remain hidden at all costs. When a series of hideous murders are committed, Bruno is compelled to investigate. What he finds makes it brutally clear that the Tudor throne itself is at stake....