The Mystery of the French Powder

In the window of the popular New York department store "French," the body of a woman – the wife of the store's owner – was found right during the presentation of the new furniture collection. Who shot her and under what circumstances?

Richard Quinn, a famous police inspector, immediately begins the investigation, but he cannot manage without his son, amateur detective Ellery.
The second case of Ellery Queen, a well-known writer and detective.