After joining the the Lovat Scouts at the outbreak of the Second World War Donald Angus Gillies is sent on a mission to the Alps, where he meets Francoise, a young French Canadian SOE agent. The pair immediately form a close bond, but when Francoise is injured and captured, DA realizes his feelings for her are much, much stronger. After desperate attempts to find her, he has given up all hope. But a posting to Canada leads to some remarkable news, not just about Francoise but also about his own family.

Reunited once more, Donald Angus and Francoise plan to live together in his beloved Ardnish, but have one further mission to complete first - a mission more dangerous than anything they have ever faced before . . .