'Oh, well, everyone has to die sometime. I never worry over people dying...' When socialite Lucy Angkatell organises a weekend's entertainment at her English country house, The Hollow, it seems she has thought of everything: the capable butler, the requisite number of kitchen maids - in fact, the only thing she seems to have overlooked is the fact that most of her guests hate each other. A far-from-warm welcome greets Hercule Poirot as he arrives for lunch. Instead, a man lies dying by the swimming pool, as a gun sinks slowly to the bottom...