Life on a British bomber base, and the surrounding towns, from the opening days of the Battle of Britain, to the arrival of the Americans, who join in the bomber offensive. The film centres around Pilot Officer Peter Penrose, fresh out of a training unit, who joins the squadron, and quickly discovers about life during war time. He falls for Iris, a young girl who lives at the local hotel, but he becomes disillusioned about marriage, when the squadron commander dies in a raid, and leaves his wife, the hotel manageress, with a young son to bring up. As the war progresses, Penross comes to terms that he has survived, while others have been killed.

James Harg and his father work in a steelmaking plant which is incompetently run, with scant attention being paid to worker safety. In his own time, Harg works on ideas for a revolutionary new manufacturing process for hard steel. When his father is badly injured in a workplace accident resulting from employer negligence, Harg uses some of the compensation payment to develop his invention to a stage where it can be tested in practice. It is a huge success and Harg patents his process. He rises to a position on the board of the company, before staging a coup to oust his former employer and take over the business himself.

John Zinga, a descendent of slaves, has an ancient medallion around his neck and a fragment of song passed down generations. He is an English dockworker with a magnificent voice and a yearning to learn his roots.

Jimmy Bancroft, a fighter pilot, who is recovering from injuries sustained during the Battle of Britain, and Hazel Court, a nurse, come across a pair of rare birds nestling in a field. After a run in with the army, and a couple of thieves, they, with the cooperation of the village people and the Ornithology Society, help the eggs to hatch. A wonderful look at life in a small village, during World War II.