When a young woman is found in a locked room having been shot, the police assume it’s suicide. However, when Poirot looks further he begins to suspect murder – would a right-handed woman shoot herself from the left?

A story of novella length, it was first published in Woman’s Journal in December 1936, and later formed one of four stories the collection, Murder in the Mews, published in 1937 by Collins. Robin Macartnay, draughtsman on the Mallowan's archaeological digs, again illustrated the jacket for the Crime Club edition.

It formed the second episode of the first series of Agatha Christie’s Poirot in 1989, starring David Suchet. Japp was played by Philip Jackson and it included the characters of Hastings (Hugh Fraser) and Miss Lemon (Pauline Moran).