A murdered man. A mysterious woman. A note in another language.

Irene Holmes, daughter of the long-retired Sherlock Holmes, used her unique talents of deduction and observation to assist her childhood friend Detective Eddy Lestrade with his cases during the war. With the war over, Eddy keeps her on as a consultant, finding her essential to solving crimes.

During one of these cases, Irene meets Joe, a man who finds her instantly intriguing and has enough opinions of his own to keep up with her challenging personality. When Eddy requests her help on a perplexing murder case, Irene drags Joe along as her assistant. Using many of her father's lessons, they traverse post-war London, determined to find the killer before he strikes again.

A coded message. A secret past. A desperate man.

With two weeks in a new home, and a solved murder, under their belt, Irene and Joe are eager for another mystery. When Eddy brings them a curious case involving a jumbled circular message, the consultants jump in with both feet.

But as they attempt to crack the cipher, they uncover a dark past of a seemingly innocent young woman and a cover-up that may put them both in grave danger.

Two dead bodies. A missing horse. A mysterious man.

When a famous dressage horse goes missing in the middle of the night, and the bodies of an unknown man and local stable boy are found dead outside the horse's empty stall, the blame is immediately pinned on a gorgeous amiable stallion covered in the victims' blood. Eddy calls upon Irene and Joe's assistance as the stallion's handler swears by his, and his horse's, innocence.

The trio take a trip to the country to navigate the intricate bond between horses and their trainers and discover layers of betrayal and secrecy coating this glamorous sport.

Unusual demands. Family secrets. A mysterious door.

Irene and Joe face their most curious case yet when a woman asks them to investigate the wealthy family she began working as a housekeeper for a few months prior. Locked doors and secret rooms permeate the household and the further Irene and Joe probe into the family's life, the deeper the secrets become.

They play a dangerous game of undercover to see just what mysteries lay beneath the floorboards of this dark household, but what they discover is more than either of them bargained for.

An affluent society. A missing man. A frantic woman.

Miss Hudson asks Irene and Joe for their help solving a curious case for a group of London's most affluent residents when the curator for their weekly social meetings of the Red Rover Society vanishes without a trace. The organization welcomed the wealthy group and their gorgeous red dogs, but now the patrons are at a loss. Who will organize their gatherings week to week and where did their leader disappear to?

Whoever is behind this mysterious organization isn't finished yet, however, and Irene and Joe must act fast before a more sinister plan is put in place.

A curios marriage. A new ally. A dangerous foe.

Irene and Joe's previous cases come to a head when Mr. Cullen of British Intelligence pays a visit to Baker Street. He tasks the pair with scoping out a wedding of the son of one of the biggest companies in London to ensure no harm comes to him during the upcoming ceremony. Mr. Cullen is worried that the mystery woman with the A.B. initials Irene has been unknowingly playing tag with will disrupt the wedding and cause undue trauma to this innocent family.

As Irene and Joe dig further into the bride and groom though, they discover secrets that the happy couple would prefer to keep quiet, and reasons for someone wanting each of them out of the picture-for good.

With meddling, often come trouble, and it isn't long before Irene and Joe are deep in a twisted web of lies and deception that they struggle to escape. Tension runs high between the pair and puts them in grave danger while threatening to disrupt the friendship they've worked so hard to build.

A quiet street. A mysterious man. An old secret.

After a harsh winter, 1947 has settled on Baker Street. Irene Holmes is restless and determined to find a case, no matter how big or small. When Joe Watson's girlfriend, Sarah, moves into a new house with her friends, and a man is seen walking up and down the street, Irene leaps at the mystery - whether there's one or not.
After a few failed leads, and not one strange occurrence, Irene is almost ready to give up. Then, a string of break-ins on Sarah's street pulls everyone together into a tale of spies and secrets leftover from the war.

Three Wealthy families. Two missing woman. One big secret.

When two young women go missing at a prestigious finishing school, Irene and Joe are requested to investigate the disappearance. Both students hail from wealthy families and where there's money - there's impatience and demand.

But not all is as it seems behind the closed doors of these wealthy families. Soon, Irene and Joe are thrust into a world of feuding parents and secret pasts, and must try as hard as they can to keep their wits about them.

A Famous Film Star. A Vandalized Poster. A Hunt for a Killer

London is abuzz with the premiere of the film ‘The Thief At Midnight’. The film’s American stars, the beautiful Kathleen Carrington and the flirtatious Don Radcliffe, have come to Britain for the red carpet. However, they are met with vandalized posters and a message that clearly someone doesn’t want Miss Carrington to leave London alive. They request Irene and Joe specifically to search the hotel the actors are staying in - The Ritz, of course - and the theatre, for any signs of foul play.

Just when Irene is about to rule this case a dud, a dead body turns up with the victim bearing a strange resemblance to Miss Kathleen Carrington herself. Irene, Joe, and DI Lestrade are swept up into the glitz and glamour of Hollywood as they attempt to keep the killer from striking again - all while trying to keep a low profile with the two biggest stars in the city.