"Peril at End House" by Agatha Christie follows the brilliant detective Hercule Poirot, who, while on holiday in Cornwall, meets Nick Buckley, a spirited young woman who has narrowly escaped death several times in recent days. Convinced that someone is trying to murder her, Poirot vows to protect her. But when Nick's cousin Maggie is shot dead at a fireworks display while wearing Nick's distinctive shawl, it becomes clear that the killer intended to murder Nick. As Poirot investigates the guests staying at End House, he uncovers secrets involving cocaine smuggling, hidden wills, and family fortunes, ultimately exposing a shocking deception.