The story revolves around a brother and sister, both born in Germany to a German mother and English father. The mother and her two children moved to England prior to WWII. After the start of the war between Britain and Germany, the mother was picked up by hypersensitive British security agents and taken to a far away place for interrogation and detention. The agents falsely told her two children she died in an accident, but they were doubtful. Both became bitter at their mother's death, and gradually became pro-Germany for that and other reasons. The son worked in a low level job at the British code-breaking facility and had access to some low level secrets. Primarily the son decided to return to Germany and influenced his sister to go along with him. He was a bird watcher and photographer and during a two day trip to the beach he knew about, to watch and shoot a movie of birds in flight, he stumbled into a joint British and American exercise involving beach landings, and many Americans were unnecessarily killed. He photographed much of that and decided to get the film to Germany with the hope that the film would cause the U.S. to quit the war with Germany and he influenced his sister to go with him. The story portrays his efforts to escape from Britain and get to Germany, with many twists and turns which are very well protrayed in the book. It is very good reading, and keeps the reader's rapt attention. It has a surprise ending, and I wouldn't want to give it away here. This is not the usual WWII book about civilian life in wartime, and has a good bit of suspense and a surprise ending. I highly recommend it.