As all the road signs have been removed from the area, the platoon is ordered to put up temporary ones to help a large convoy on manoeuvres that is due to drive through the area, but due to the condition of the ground Jones's van gets stuck in the mud.

The platoon takes over from the regular army in guarding some vital telephone wires. During an air raid a bomb lands in the wires and a way has to be found to get it down before it explodes.