Steven Dyer, an executive working for a giant multinational drugs company, decides to report his employer for breaches of Common Market trading regulations. One night in Basle, Switzerland, he leaves his home to post a letter, the start of a nightmare journey that leads to terrible consequences for his life, his career and for his wife and children.
A scientist is persuaded by the government to inject himself with the brain fluid of a dying colleague in order to preserve missile-defense secrets. However, he finds that he is now torn between his own wife and that of his dead colleague, who was a Nazi sympathizer.
The four kids, Julian, Dick, Georgina and Anne plus the dog Tim go on a bike-trip without any grownups around, but they are soon followed by a another boy, Richard, who is pursued by kidnappers.
In 1940, the Royal Air Force fights a desperate battle against the might of the Luftwaffe for control of the skies over Britain, thus preventing the Nazi invasion of Britain.
Seeking revenge against the rival clan responsible for the killing, Hagbard, the son of a slain Norse king, calms down long enough to establish a truce. He also falls in love with Signe, the daughter of his one-time enemy. Signe's former beau, sizzling with jealousy, breaks the truce and makes it appear that Hagbard was responsible.
