The Jericho team were a trio of Allied specialists who operated as intelligence agents and saboteurs behind Nazi lines. Franklin Sheppard, of US Army Intelligence, was their commanding officer and chief planner. Jean-Gaston Andre, of the Free French Air Force, was the team's demolitions and weapons expert. Nicholas Gage, of the British Navy, was a former circus performer (high-wire artist) whose specialty was getting in and out of Nazi installations.
The good guys use a French boys choir to thwart the Germans. The choir cycles through town singing, each carrying a large loaf of bread in the basket on the bicycle. Cleverly hidden inside each loaf is a stick of dynamite (thus, the title). The dynamite is used to blow up the German subs sitting in the harbor.