Cecelia, who was punished by her father when she was a young girl for being exceptionally good at calculus, has grown up to earn a degree in mathematics, but then unexpectedly inherits a business that is an odd combination of a girl's school, a night club, and a brothel. Through this new business she gains knowledge of sensitive information that require her to hide in Scotland under the protection of the hunky Scotsman of the title.

I am not a good person to judge books in this genre. All I can say is that occasional discussions of mathematics mostly focus on Cecelia's interest in cryptography and other characters' lack of interest in math.