During World War II, a German woman, Inga, goes missing and is presumed dead. Her infant son is placed in an orphanage where, years later, he's adopted by a childless couple. The adoptive parents' happiness is shattered when Inga reappears and insists on custody of her son.

Two Welsh coal-mining brothers win a trip to London to claim a monetary prize. They are supposed to meet a newspaper reporter who will be their escort. Instead, the brothers are launched into an adventure with some London riff-raff. It is up to the reporter to look out for the brothers, and what a job it turns out to be!