We're in an English village shortly before Dunkirk. "Mr. Tom" Oakley still broods over the death of his wife and small son while he was away in the navy during WWI, and grief has made him a surly hermit. Now children evacuated from London are overwhelming volunteers to house them. Practically under protest, Mr. Tom takes in a painfully quiet 10-year-old, who gradually reveals big problems. William nightly wets the bed. He can't read or write, although he is intelligent and shows artistic talent. He constantly dreads going to hell. Scars cover his back. Mr. Tom soon realizes that his little boarder comes from a horribly abusive home, and determines to provide him a better one. All goes well until William's mother persuades him to return to London for a few days' visit. When Mr. Tom hears nothing from the boy after two weeks, he can endure the loneliness and worry no longer. 英国孩子必看的影片之一??。 汤姆（约翰·肖 John Thaw 饰）是一个性格非常孤僻古怪的老人，常年独自生活在一座地处偏远的小镇之中，他没有家人也没有朋友，整天摆着一张臭脸，拒人于千里之外。纷飞的战火席卷了大半个世界，即使偏僻的小镇也不能幸免。十一岁的男孩威廉（尼克·罗宾森 Nick Robinson 饰）在伦敦的一次空袭中死里逃生，来到了小镇里寻求庇护，就这样，命运让威廉和汤姆相遇了。 刚开始，汤姆和威廉这对年龄差距巨大，个性南辕北辙的搭档之间产生了很多的误解和矛盾，但随着时间的推移，一老一少相互产生了亲情的联结。就在他们决定相依为命共同生活之时，威廉的母亲忽然出现，她要将威廉带回曾经给他的心灵带来过阴影的伦敦。
