Searching in London for a replacement nanny, Georgie learns that several healthy young men from fashionable families have died suddenly in incidents described as accidents. The victims appear unconnected, but the repetition convinces Georgie and her friend ZouZou that someone is selecting them.
Georgie traces the men’s schools, clubs and social relationships in search of a shared past. When she realizes that Darcy fits the emerging pattern, the investigation becomes a race to identify the killer before her husband is chosen as the next victim.