Margaret Capel follows the life and experiences of its titular character, Margaret Capel. The novel likely unfolds in a serialized format across its three volumes, tracing Margaret's journey through various challenges, relationships, and personal growth. Victorian novels often explore themes such as love, class, morality, and societal expectations, and "Margaret Capel" is likely to delve into these themes as well. The plot may include elements of romance, drama, and social commentary typical of Victorian literature.