Viscount Spencer Law has recently returned from a trip wherein he visited his brother in America. During his trip he had become acquainted with Abigail Mercer, the daughter of a successful medicinal inventor. Spencer never intends to marry so he ignores his attraction to Abigail. His refusal to marry is at the heart of Married to the Viscount and is not your usual "I don't plan to marry" hero talk. Spencer plans for his younger brother to continue their family line. However, his brother doesn't want that responsibility either although their reasoning is vastly different.
Abigail was fascinated with Viscount Spencer Law when he visited America. She fondly remembers him and eagerly accepts his proposal of marriage by proxy. Spencer's brother stands in for him at this proxy marriage and makes plans for Abigail to travel to England to join her new husband once her father dies. Abigail arrives in England at the viscount's residence about a month later and gives the viscount one big surprise. It seems that Viscount Spencer Law knows nothing of his proxy marriage. Their initial confrontation is made somewhat public since the viscount is hosting a dinner at the time. Abigail faints, as she is thoroughly humiliated and greatly saddened at the truth - she is not married. The viscount is confused, enraged, and at the same time sympathetic of Abigail's vulnerable situation. He wants to do bodily harm to his scheming brother who masterminded this fake proxy marriage but he can't. His brother has disappeared and taken Abigail's dowry with him.