The Marquess of Tregarron has returned to London after an old scandal, with no great hopes as to how he'll be received. He expects to be shunned, though since he's wealthy, has a lofty title and is looking for a wife he expects that he won't be shown the door everywhere he goes. His money, if not himself, will be welcome.
His town house is a mess; it's been empty for eight years and is falling apart inside. Tregarron hires Buchanan and Buchanan, architects, to set it to rights. What he doesn't know is that plain and freckled Cate Buchanan is the real architect, while her uncles are merely a front for her business. Cate knows that if anyone finds out the truth, the business will be destroyed, so she goes to great pains to prevent Tregarron from finding out. She shouldn't really be seeing much of him - yet for some reason he keeps coming back to the house, and anyway, Cate's younger sister and the patronage of the Hythes (from Best Laid Plans) militate against Cate avoiding Society entirely.
For his part, Tregarron can't understand his fascination with Cate. She has a sharp tongue and she is not at all pretty. And yet he finds himself irrestibly attracted to her...
I do enjoy heroes with a murky past and tortured soul, and Tregarron is certainly that. He's also chivalrous even despite himself, which endears him to me even more. As for Cate, she's amusing and entertaining, far from being a simpering heroine. These two make a great couple.
Some nitpicks: Tregarron is a Cornish name, and yet his main country seat is in Wales? One or two anachronisms crop up here and there in dialogue. More importantly, Jensen has a habit of glossing over some interesting and important detail, so after what was a (very nicely) slow-moving romance, it's all tied up in about three pages at the end. Likewise, she doesn't tell us just when and how Tregarron worked out that Cate really was the architect, nor how he guessed who was sending the apparently threatening notes - for something which was causing pain and fear to both Cate and Tregarron (both of whom thought the notes were aimed at them), this element was skimmed over far too quickly.
Nevertheless, a very enjoyable book; it's a shame that Jensen's more recent work isn't up to the standard of her earlier novels, such as this and His Grace Endures.