Elspeth McGillicuddy, an old friend of Miss Marple’s, witnesses a strangulation murder in a passing train through the window of her coach compartment. When Police Inspector Slack can’t find a body along the tracks and doubts the validity of the story, Miss Marple and Elspeth locate the area where the body was probably thrown from the train, the isolated manor house of an aged, cantankerous millionaire, Luther Crackenthorpe. Miss Marple’s niece Lucy is recruited to apply for a job on the estate in hopes of locating the corpse. When she finds it in an ancient sarcophagus in an outbuilding housing Egyptian and Etruscan art treasures, the police and Miss Marple are brought in. Obviously someone in the large household is involved, but who?

The mysterious and charismatic Russian-born Nikolai Luzhin is a driver for one of London’s most notorious organized crime families of Eastern European origin. The family itself is part of the Vory V Zakone criminal brotherhood. Headed by Semyon, whose courtly charm as the welcoming proprietor of the plush Trans-Siberian restaurant impeccably masks a cold and brutal core, the family’s fortunes are tested by Semyon’s volatile son and enforcer, Kirill, who is more tightly bound to Nikolai than to his own father. But Nikolai’s carefully maintained existence is jarred once he crosses paths at Christmastime with Anna Khitrova, a midwife at a North London hospital. Anna is deeply affected by the desperate situation of a young teenager who dies while giving birth to a baby. Anna resolves to try to trace the baby’s lineage and relatives. The girl’s personal diary also survives her; it is written in Russian, and Anna seeks answers in it. Anna’s mother Helen does not discourage her, but Anna’s irascible Russian-born uncle Stepan urges caution. He is right to do so; by delving into the diary, Anna has accidentally unleashed the full fury of the Vory. With Semyon and Kirill closing ranks and Anna pressing her inquiries, Nikolai unexpectedly finds his loyalties divided. The family tightens its grip on him; who can, or should, he trust? Several lives - including his own - hang in the balance as a harrowing chain of murder, deceit, and retribution reverberates through the darkest corners of both the family and London itself.

Holmes and Watson investigate a series of bizarre and apparently unconnected murders, and the death of a possible suspect. The trail leads to a society of hypnotists and a mysterious, glamoruos woman. The fiendish Dr Moriarty, though reported hanged in Montevideo, is belived to be involved.

Holmes is hired by Roland Carstairs to prevent the theft of the Star of Rhodesia, an enormous diamond owned by Carstairs’ mother, Lady Margaret. Believing the diamond will be stolen on a train trip from London to Edinburgh, Holmes deftly switches diamonds with Lady Margaret while in her compartment. Soon after, Roland is murdered and the fake diamond is stolen. Red herrings abound as Holmes, aided by Dr. Watson and Inspector Lestrade, discover the murderer’s hiding place and deduce that long-time foe Moriarty’s henchman Colonel Sebastian Moran is somehow involved in the crime.