The church choirs of St. Cyril's and St. Cyprian's are run by former friends, now bitter rivals since their school days. Forced by a threatened clash of performance dates to co-ordinate arrangements, they are induced to co-operate more closely by an offer of sponsorship from a local business. Their first joint engagement at the home of an émigré Russian oligarch gains not entirely unwelcome publicity from the murder of their host during the evening. A later joint performance, with an orchestra supported by their own sponsor's American counterpart, leads to a discovery ending the quarrel between the two choir leaders.