Lytcham Close, one of the oldest stately homes in England, is owned by the last remaining heir and ruled by his intolerable whims. Old Hubert demands complete silence when he plays music and times dinner exactly by a resounding gong. Rushing down at the sound of the second - or is it the first? - gong, Joan Ashby is about to find out that not only is dinner delayed, but something is going on that no one can explain. Everyone is thrown into disarray when Old Hubert never materializes and instead a new guest is announced: Hercule Poirot himself.

An aging, heavily-insured country squire whose estate is in financial ruin is thought to have committed suicide. Hercule Poirot investigates, in the guise of a representative of the victim's insurance company, to uncover the identity of the real murderer.

An alarming telephone call, in which the phrases “it’s life and death” and “the table with the yellow irises” are whispered, causes Hercule Poirot to rush to the luxuriant restaurant Jardin des Cygnes, desperate to stop an impending murder and find the person behind the voice on the phone. After bumping into an old acquaintance, he is invited to join a dinner party in full swing. But, just as the dancing and champagne are overflowing, a morbid announcement is made and the lights go out.

Hercule Poirot is about to tuck into a very traditional English supper with his old friend Bonnington when a lone diner sparks his interest. Like clockwork, the man has eaten at the restaurant on Thursdays and Tuesdays for the last 10 years, but no one on the staff knows his name. When "Old Father Time", as they have fondly nicknamed him, suddenly stops coming, Poirot believes that he might have picked up the one essential clue that could shed light on this mysterious man. Could what Old Father Time ordered as his final meal provide the key?

Mr. Davenheim, a wealthy financier, leaves his home to mail a letter, then fails to return. The story fills the newspapers and intrigues Hercule Poirot, who challenges Inspector Japp with the claim that he can solve the case before the police, and without leaving his flat.

Major Hastings and Hercule Poirot are not interested in the mystery of the Spanish chest, which has been reported in the papers so often that it seems to be an entirely closed case. But, when Hastings persuades Poirot to attend a fabulous party given by Lady Chatterton, they discover someone sequestered upstairs who is desperate for their help. Will the contents of a dead man's pockets reveal to the inscrutable eye of Hercule Poirot who the culprit is?

Mr. Satterthwaite and Colonel Melrose are comfortably ensconced in the Colonel's study when the phone suddenly rings. Someone has been murdered, and, as the county chief constable, the Colonel lets Satterthwaite accompany him to the scene of the crime. The two of them have opposing opinions on why Sir James Dwighton has been bashed over the head with a blunt instrument. Rumor had it that red-haired beauty Laura Dwighton and her guest, the very attractive Mr. Paul Delangua, were engaged in an illicit affair, and Paul was thrown out by the disgruntled Sir James. But the facts of the murder all seem to add up too nicely....

At Mr. and Mrs. Unkerton's party in Greenway's House, Mr. Satterthwaite learns of a haunted window: No matter how many times it is replaced, it always contains the image of a gentleman in a plumed hat. When gunshots are heard, Satterthwaite finds that two of the guests have been shot dead, which is shortly followed by a sighting of the gentleman in the newly-replaced windowpane. Can Mr. Quin shed light on the mystery?

The recently married Alix Martin is obsessed with a recurring dream of her new husband's murder. Each time she can see the murderer clearly, and it's the mild-mannered man she had previously been engaged to, taking his revenge. But, what's worse is that at the end of the dream she thanks the murderer. Perplexed, Alix tries to calm herself by spending time in the garden of her picturesque cottage. But her gardener confuses her further by wishing her well on her trip to London - a trip which Alix knows nothing about. Now Alix is scared: Is the gardener imagining things, or is she?

Jane Cleveland is in desperate need of a job, and when she sees an ad for a woman of her description needed to impersonate a grand duchess, she cannot believe her luck. The royal retainers tell Jane that the job will be dangerous because attempts have been made on the Grand Duchess Pauline's life, but this only serves to make the job more appealing. Jane's disguise initially goes according to plan, but when she is kidnapped and drugged, it appears that her new employers are not all that they seem....

Hercule Poirot is asked by Prince Paul of Maurania to solve the murder of Henry Reedburn, which has greatly distressed the Prince's fiancée, the famous dancer Valerie Saintclair. The only other witnesses seem to be a family of four who were playing bridge near an open window when she staggered in, crying, "Murder!"

When Mr. Satterthwaite visits a new exhibit at the Harchester Galleries, there is one painting that bears an unusual likeness to a mysterious acquaintance of his, Mr. Quin. In one bold move he purchases the canvas on the spot, and in another invites the artist of "The Dead Harlequin" to dine with him that night, with an empty place at the table set for Mr. Quin. Dinner conversation soon turns to the setting of "The Dead Harlequin", the doomed and ghostly house Charnley, where many have perished under tragic circumstances.

Hercule Poirot and Captain Hastings are on holiday at the opulent Grand Metropolitan Hotel in Brighton, where they meet the wife of a wealthy stockbroker. As they discuss the jewels worn by Mrs. Opalsen, the great detective relates his experiences in cases which have concerned some of the best-known jewels in the world. Excited by his anecdotes, the wealthy matron eagerly offers to show him a very expensive pearl necklace, but when she goes to retrieve it, she discovers that it has been stolen....

The Leonides are one big happy family living in a sprawling, ramshackle mansion. That is until the head of the household, Aristide, is murdered with a fatal barbiturate injection. Suspicion naturally falls on the old man's young widow, fifty years his junior. But the murderer has reckoned without the tenacity of Charles Hayward, fiancé of the late millionaire's granddaughter.

A murder trial takes a diabolical turn when the wife of the accused takes the stand.... A woman's sixth sense - and a loaded revolver - signal premonitions of doom.... A stranded motorist seeks refuge in a remote mansion and is greeted with a dire warning.... Detective Hercule Poirot faces his greatest challenge when his services are enlisted - by the victim - in a bizarre locked-room murder.

From the stunning title story (which inspired the classic film thriller) to the rarest gems in detective fiction, these eleven tales of baffling crime and brilliant deduction showcase Agatha Christie at her dazzling best.