Simla, 1932

Life-long friends, Lilian Hunt and Daisy Chatsworth, whose fathers work for the British government in India, have travelled north with their families from Delhi to Simla, eagerly anticipating a summer of parties, dances and, dare they hope, romance.

Frederick, Lilian’s ambitious father, is determined that Lilian should marry Eric, the son of his superior, Cecil Stanford, as that is what Cecil wants. Eric, however, against his father’s clearly expressed wishes, is drawn to Daisy. But Cecil objects to Eric marrying a Chatsworth, though no one knows why.

Lilian decides to take matters into her hands, and help her friend to win the man she loves.

Unknown to Frederick, he has an enemy in Simla, and soon after his arrival, that enemy makes his presence felt.

Feeling increasingly threatened, Frederick asks a new colleague, Jack Leighton, to stay close to Lilian and Daisy without them realising he’s there to protect them. Jack has taken an instant dislike to Lilian but, reluctantly, he agrees.

But the enemy is watching…