High on a rocky outcrop above heathland stands a Victorian Gothic mansion, built by the aristocratic and ancient Rose family. In the lodge of the house – the rest being owned by the National Trust – live the last two of the line. Rosalba Rose, seventeen and dutifully submissive to her ferocious great-aunt Martine – until she meets Eugene Seal, a young serviceman. They fall in love but is their passion, surrounded by upheaval, doomed?