A British army officer, Major Lawrence (played by Guy Rolfe), returns home from duty in the Army of Occupation in Germany. By chance he visits a London art gallery hosting an exhibition of work by war artists and he is struck by a painting called 'Portrait of Hildegard', a young girl in a displaced persons camp painted by Duncan Reid (played by Robert Beatty). Lawrence is surprised when he is joined by an elderly man, Professor Menzel (played by Arnold Marle), an Austrian refugee who claims that the girl in the painting is his daughter Lydia whom he had to desert when he fled the Nazis. Lawrence agrees to help him and they locate the artist, Reid, whom they discover to be in the advanced stages of alcoholism and he dies before he can tell them anything as to where he did the work and the whereabouts of Hildegard/Lydia. Lawrence returns to Germany and searches several displaced persons camps and, at first, to no avail, until Menzel writes to him having discovered where the painting was done, Displaced Persons Camp 31. Lawrence finds the girl (played by Mai Zetterling), but she is frightened, unwilling or simply cannot remember anything about her past, which means he cannot determine whether she is Menzel's daughter or not. Lawrence persists and learns from the camp's gossip, Hans Ackermann (played by Philo Hauser), that Reid had been trying to help Hildegard/Lydia rediscover her past so she could escape the camp, return to her people and better her life whilst painting her portrait much to the displeasure of the man whom everyone accepts as her father, fellow displaced person Hendlmann (played by Herbert Lom). Neither is he happy with Lawrence trying to find about her. But why? Is it, as he claims, because he cannot bear the thought of her remembering the horrors of war? Or does he have reasons for not wanting the past to be uncovered?
One of the earliest feature films directed by Terence Fisher before he became the noted director of Gothic horrors at the Hammer studio. For anyone interested in Fisher's work in his pre-horror days, this Gainsborough drama is worth checking out. It displays the emphasis on character that would become his trademark in his better known work and for his ability to draw emotionally affecting performances from actors. Mai Zetterling is excellent in the role as the young displaced girl who is prevented from rediscovering her past before the war and, potentially, from being reunited with her real family and rebuilding her life by the man who claims to be her father, Hendlmann, for reasons of his own. Robert Beatty is very noteworthy as the unhappy, disillusioned artist who tries to help Hildegard/Lydia because he is in love with her (as she is with him) but ultimately he cannot because he is dying and succumbing to the advance stages of alcoholism. Guy Rolfe is also quite good as the British military man, Major Lawrence, who determinedly resolves to uncover the truth and find out if she really is Menzel's daughter. He provides a contrast to the other man in Hildegard/Lydia's life: self-assured, determined and successful in terms of his military career whereas Reid is weak willed, disillusioned with life in general and is succumbing to alcoholism despite his obvious talent as a painter that is being tragically wasted. Herbert Lom is also very good in the role of the sinister Hendlmann. The settings are quite good even if some of them are clearly studio bound while Jack Asher, whose vivid Technicolor camerawork would later distinguish so many of Fisher and Hammer's ground breaking Gothic horror films, atmospherically lights the proceedings in b/w.