A group of Anglican nuns, led by Sister Clodagh, are sent to a mountain in the Himalayas. The climate in the region is hostile and the nuns are housed in an odd old palace. They work to establish a school and a hospital, but slowly their focus shifts. Sister Ruth falls for a government worker, Mr. Dean, and begins to question her vow of celibacy. As Sister Ruth obsesses over Mr. Dean, Sister Clodagh becomes immersed in her own memories of love.

General Candy, who's overseeing an English squad in 1943, is a veteran leader who doesn't have the respect of the men he's training and is considered out-of-touch with what's needed to win the war. But it wasn't always this way. Flashing back to his early career in the Boer War and World War I, we see a dashing young officer whose life has been shaped by three different women, and by a lasting friendship with a German soldier.