A romantic comedy featuring light and sophisticated writing in the manner of the day, evocative of early 1900s America. Working for an American branch of Lloyds' insurers, Owen Jephson is used to underwriting unusual things, weight loss in actors, inconvenient rain at garden parties, twins in the family, nonetheless he is taken aback when Lord Harrowby asks him to insure against his fiancee jilting him at the altar.