The Ginger Tree.

In 1903, a young Scotswoman goes to join her diplomat fiancé in Manchuria. She marries him, and finds herself in a war zone. Disenchanted with her husband, she falls in love with a married Japanese nobleman, Count Kentaro Kurihama, and bears him a son. She carves out a life for herself in Japanese society, despite the hardships and ostracism she faces as both a Westerner and a woman.