Set in 1776, The Convenient Marriage begins when seventeen-year-old Horatia Winwood offers to marry the wealthy Earl of Rule in place of her elder sister, who loves another man. The arrangement rescues the debt-ridden Winwood family and gives Rule the alliance he wants, but Horry enters fashionable Georgian society with little understanding of marriage or its expectations.
Her impulsive friendship with the dangerous Lord Lethbridge, combined with her brother’s schemes and Rule’s apparent indifference, turns the practical match into a contest of pride and loyalty. The novel follows a married couple who must move beyond negotiation and misunderstanding before either can recognise the depth of the other’s attachment.