Tommy and Tuppence are young, in love… and flat broke. Restless for excitement, they decide to embark on a daring business scheme: Young Adventurers Ltd.—"willing to do anything, go anywhere." But they get more than they bargained for when their first assignment for the sinister Mr. Whittington draws them into a diabolical conspiracy. It isn’t long before they find themselves plunged into more danger than they ever could have imagined.

Mr. Shaitana is famous as a flamboyant party host. Nevertheless, he is a man of whom everybody is a little afraid. So when he boasts to Hercule Poirot that he considers murder an art form, the detective has some reservations about accepting a party invitation to view Shaitana's "private collection". Indeed, what begins as an absorbing evening of bridge is to turn into a more dangerous game altogether.

Hercule Poirot's quiet supper in a London coffeehouse is interrupted when a young woman confides to him that she is about to be murdered. She is terrified - but begs Poirot not to find and punish her killer. Once she is dead, she insists, justice will have been done. Later that night, Poirot learns that three guests at a fashionable London Hotel have been murdered, and a cufflink has been placed in each one’s mouth. Could there be a connection with the frightened woman?

Ten strangers are lured to an isolated island mansion off the Devon coast by a mysterious "U.N. Owen". At dinner a recorded message accuses each of them in turn of having a guilty secret, and by the end of the night one of the guests is dead. Stranded by a violent storm, and haunted by a nursery rhyme counting down one by one...one by one they begin to die. Who among them is the killer? And will any of them survive?

This collection of 25 Hercule Poirot adventures is compiled from short stories written by Agatha Christie for The Sketch magazine in 1923 from March to December. In these stories, including "The Disappearance of Mr. Davenheim", "The Veiled Lady", and "The Adventure of the Egyptian Tomb", the eccentric private detective slowly and surely solves mysteries involving jealousy, revenge, and greed. These stories were well-received at the time and cemented Christie's reputation as the worthy successor to Arthur Conan Doyle.