Friends since childhood, and lovers and business partners as adults, Niamh and Ruairidh are owners of a small Hebridean company, Ranish Tweed, that weaves its own very special version of Harris Tweed. Although it's a small company, their fabrics have become internationally sought-after as a niche brand in the world of fashion and haute couture.
But the threads of their relationship are beginning to fray. As they prepare for an important showing at the Première Vision fabric fair, held in Paris every year, Niamh accuses Ruairidh of having an affair with Irina, a Russian fashion designer they work with--a fight that ends with Ruairidh storming off and getting into Irina's car. Moments later, Niamh watches in horror as the car containing her life partner explodes in a ball of flame. With Niamh a prime suspect in the murder, the Parisian police hound her even after she returns to Harris to bury the pitiful remains of her lover and business partner. Amid the grief and struggles that follow, she begins to suspect that things are not what they seem; and when there is an attempt on her life, she becomes convinced that what looked like a terrorist attack on her lover might be something more personal by far . . .