The entire focus of this novel rests on the determined though sometimes woefully mistaken efforts of three British families--the Moseleys, the Jarvises, and the Chattertons--to arrange suitable marriages for their respective sons and daughters. The bulk of the early-nineteenth-century action is therefore played out through dinners, social calls, visits to summer resorts, and development of various designs employed toward the end of matrimony. The "precaution" displayed by Mrs. Wilson in guiding her niece Emily Moseley through the treacherous shoals toward a sound Christian marriage furnishes the novel's title and indicates the author's moral and ethical position.