Jack Beauregard, an aging gunman of the Old West, only wants to retire in peace and move to Europe, but a young gunfighter known as "Nobody" who idolizes Beauregard wants him to go out in a blaze of glory. So, he arranges for Jack to face the 150-man gang known as The Wild Bunch and earn his place in history.
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.
After World War II, an ex-spy returns to Germany to search for a cache of jewels he hid in a Czechoslovakian convent.