Lady Violet and Sebastian MacHeath are trying to forge a cordial marriage out of unlikely beginnings. When they are invited to a summer house party, they accept, hoping to make the excursion into a belated wedding journey of sorts–or at least a respite from meddling relatives. No sooner do they arrive, than their host's ward is accused of petty wrongdoing. As the charges escalate into familial acrimony and worse, Violet determines that a scheme is afoot to discredit the young man.

Unraveling the mystery before a criminal investigation goes too far will require that Sebastian and Violet trust one another as they haven't in years. They can get to the bottom of the unfortunate developments at the house party, but can they solve the mystery of how to be husband and wife in more than name?