When reclusive artist Gabriel Quinn is gunned down outside a gallery on Oxford High Street, Detective Inspector Bridget Hart investigates the world of contemporary art, where paintings can change hands for millions in the auction room. Bridget is convinced that the last words spoken by the artist - a mysterious code of eight digits and a letter - are key to unraveling the mystery of his death.

When Dr. Nathan Frost, a lecturer in German literature at Oxford University, is invited to a lavish party at the country house of a wealthy businessman, he knows there'll be a price to pay. After all, as an expert on the legend of Faust and Mephistopheles, he can recognize a deal with the devil easily enough. But even he's not expecting such a sinister end to the evening. 

When a beautiful, wealthy student is found dead in her room in Oxford's most prestigious college, Detective Inspector Bridget Hart is called to investigate. The murdered girl appeared to have no enemies, yet was killed in a brutal and bloody assault. Haunted and driven by her own personal tragedy, newly promoted DI Bridget Hart has a lot to prove as she leads her first murder case. Her investigation uncovers a tangled web of lies, lust and ambition, and brings her into conflict with powerful interests.

It's nearly Christmas in Oxford, and Detective Inspector Bridget Hart is enjoying a rare day off at Oxford's Christmas Market. A ghost tour seems like a fun way to round off the day. Until, that is, a brutal murder brings the evening to a tragic close. Torn between work and family commitments over the festive season, Bridget soon discovers that the ghost of Christmas past is reaching out to the present with fatal consequences.

After a young woman is found strangled to death, Bliss is called to the scene. When he learns that one of his business cards was found among the victim's clothing and he is told what was written on the back of it, Bliss is immediately troubled. The card was one of five he handed out to trafficked young women he and his team had previously rescued from a shipping container. 

A serial killer is loose in Yorkshire and has claimed three victims in three months. Thirteen days before each murder, a large purple V is painted on the front door of the victim's house. The victims, all of whom have some association with the occult, are found drained of blood with two red marks on their neck. When Ruby Barnett comes home one evening to find a large purple V on her front door, it becomes clear she is the so-called Vampire Killer's next victim. 

It is 1864 when Lizzie Martin takes up the post of companion to a wealthy widow who is also a slum landlord. Lizzie is intrigued to learn that her predecessor disappeared, supposedly having run off with an unknown man. But when the girl's body is found in the rubble of one of the recently demolished slums around the prestigious new railway station at St Pancras, Lizzie begins to wonder exactly what has been going on.

As May Day dawns in the peaceful village of Middle Fenton, a young woman’s body is found brutally strangled, her body tied up with ribbons in the middle of the green. A week later, her boyfriend is found hanged in a local barn, and the police assume guilt over murdering his beloved has driven him to suicide - but not everyone is convinced. WPC Trudy Loveday and coroner Clement Ryder are sent to investigate, and quickly realise that there’s a double murderer on the loose. But the killer has already shown willingness to remove anyone who threatens to discover their identity.

London, 1896. Madame Tussauds opens to find one of its nightwatchmen decapitated and his colleague nowhere to be found. To the police, the case seems simple: one killed the other and fled, but workers at the museum aren’t convinced. Although forbidden contact by his superior officer, Scotland Yard detective John Feather secretly enlists ‘The Museum Detectives’ Daniel Wilson and Abigail Fenton to aid the police investigation. When the body of the missing nightwatchman is discovered encased within a wax figure, the case suddenly becomes more complex. 

Kate Palmer is most disappointed when renovations at her sister Angie’s new tea rooms are derailed after a body is discovered in the cellar. She was looking forward to clotted cream teas with a seaside view. Instead, she has another murder mystery to solve. If the village gossip is to be believed, the unfortunate man was connected to the wealthy Hedgefield family. Kate is reluctant to get caught up in the investigation, but a curious card in the victim’s jacket pocket sparks her interest.

Before Jack the Ripper terrorised London, Police Inspector Samuel Ravenscroft patrolled the streets of Whitechapel. Clever and hard-working, Ravenscroft nonetheless has the worst record in the force. He lets a murderer escape during a chase and is banished to the spa town of Malvern for a water treatment to cure his asthma. Ravenscroft accepts a dinner invitation from a new acquaintance, Jabez Pitzer. Before dinner, the maid finds Pitzer slumped over his desk - dead. Ravenscroft immediately recognises the signs - Pitzer has been poisoned.

When DI John Marco discovers the body of Felix Bevard, he knows instantly the killing was a professional hit. With no apparent motive, Marco is forced to delve into Bevard's murky past to try to find the murderer. As Marco examines Bevard's past crimes, one name keeps cropping up. A brutal murderer, Walsh has a motive for killing Bevard and the power to do it, but there's just one problem - Walsh is already behind bars. Now, Marco must prove Walsh's guilt or catch the real killer still at large, before he becomes a victim himself.

When a well-connected and wealthy banker is found dead in his luxury car in the middle of Cardiff, the motive for the crime seems clear. The killer even left a note telling the world the man deserved to die, simply for his greed. But despite the obvious clues, seasoned detective John Marco has his doubts that this was just a disgruntled employee. Marco also has a gut feeling that the family of the victim is hiding something.

A cold case warms up when an archaeological dig uncovers the remains of a student who went missing a decade previously. It was a missing person case that bugged ex-inspector Fabia Havard long after she left the force. Now she has been asked by DCI Matt Lambert to aid the investigation. Caleb Morgan went missing whilst studying at a university campus near the ancient Roman city of Caerleon. Now, with his body finally found during an archaeological dig, partly exposed due to the riverbank subsiding after a flood, there is new evidence. It is clear he was murdered.

Kate’s retirement in Cornwall hasn’t quite gone as planned - Lavender Cottage is in need of substantial repairs, and her sister Angie’s fondness for gin does rather stretch the purse strings. So when Kate is asked to do some nursing at the luxury retirement flats in Seaview Grange, she jumps at the chance. The old Victorian house has stunning views of the sea, and the retirees are a peaceful bunch. That is, until Edina Martinelli, a glamorous ex-opera singer, is found poisoned in her home.