Key Zest food critic Hayley Snow and her groom, police detective Nathan Bransford, chose Scotland for their long-delayed honeymoon, hoping to sightsee and enjoy some prize-winning scones. But their romantic duo swells to a crowd when they're joined by Nathan's family as well as octogenarian Miss Gloria.

Nathan's sister Vera takes the women on a whirlwind tour of some of Scotland's iconic mystic places as research for a looming book project. But the trip takes a deadly tartan turn when a dinner party guest falls ill and claims she was poisoned. And then the group watches in horror as a mysterious tourist tumbles to his death from the famous Falkirk Wheel, high above the Forth & Clyde canal.

Vera and her friends deny knowing the dead man, but after observing their reactions to the fall, Hayley is not convinced. With one person dead, a second possibly poisoned, and the tension among Vera's friends as thick as farmhouse cheese, Hayley fears her long-awaited honeymoon might end with another murder.

Far away from home, surrounded by unfamiliar faces, eccentric characters, and a forbiddingly gorgeous setting, Hayley must call on all her savvy to keep a killer from striking again and then escaping Scot free.