In the months since their father, Rory, died, the MacLeod sisters have had to contend with bands of smugglers convinced he left a treasure buried within the walls of their home at Castle Cairncross. Only the most mystifying occurrences have foiled the thieves--stirring whispers that the sisters are sorceresses. Yet, they have no treasure, nor are they witches. However, each inexplicably possesses a unique ability. The eldest, Catriona, is a brilliant healer and alchemist--a skill she is about to put to unforeseen use . . .

Hamish Muir, the charismatic Marquess of Ballantyne and son of Rory's business partner, has come to claim his share of the treasure. When he spies fiery-haired Cat in the village, he follows her. But the tables turn, and Hamish finds himself at Castle Cairncross--emerging from a daze . . .

Persuaded the castle harbors no treasure, Hamish remains certain Rory hid it somewhere. Cat offers a proposal: She will help Hamish decipher her father's notes if he takes her on the treasure hunt with him--and her sisters are not left alone. Reluctantly, Hamish summons two Lairds to the castle. But as he and Cat set off to navigate a maze of maps and danger, a mutual respect--and attraction--ignites between them. Perhaps the real treasure isn't gold after all . . .