John Howard is determined to brighten up his old age by taking a fishing trip to France, but during his stay the Nazis invade. Howard must try to escape back to England with the two small children of some friends who are forced to stay behind in order to help the Allied war effort. As the conflict grows closer, the roads become impassable and Howard also comes across five more children who need his help. He ends up leading this motley group of youngsters through the French countryside, constantly beset by danger yet heroically protecting his charges.
Pied Piper has twice been adapted for feature film, with Peter O'Toole playing Howard in the 1990 version and Monty Woolley in the 1942 version.