Seventeenth century Highlander Michael Cameron should have been prepared for his journey to Philadelphia in 1895. After all, it wasn't the first time he'd been kidnapped by two mischievous muses, who delighted in taking him by surprise and shuffling him off to far-flung lands and eras. But nothing could have readied him for angelic Gabriella Murray, the Duchess of Northampton. She’s a beautiful, lovely, gorgeous—did he mention just how bonny Gabby is?—duchess, and he’s a lowly Scot. How is he going to solve the missing children case the muses have given him with such a distracting woman?

Becoming friends with a muse, Gabby feels her life has taken a turn for the fantastic, which suits her fine, since being a duchess is gray and depressing. So, when that muse asks her to go on an adventure imitating her idol, Sherlock Holmes, of course she says yes. However, Michael, who is to play her Dr. Watson, is quite possibly the most handsome and intriguing Highlander she’s ever encountered. Lord, Sherlock never had to contend with an overwhelming desire for Watson. How can she concentrate on the case when he’s more fun than she’s ever had before?

As Michael and Gabby hunt through the mean streets of cities such as Chicago and Detroit, they dive deeper into a world of danger and violence. Fighting against their growing attraction to each other, they race against time to find the children, knowing that with every corner they turn, they might be too late.