Private Potts mixes up some papers he's been entrusted with and instead of Colonel Witherton going for a dirty weekend with his secretary he ends up being parachuted behind enemy lines.
Someone has infiltrated Churchill's underground headquarters and Potts thinks he knows who it is, but after a couple of false accusations he finally gets his man.
Private Potts gets lumbered babysitting a regimental mascot, a goat.He excels himself with the mishandling of orders sending General De Gaulle to the Tower and treating a nazi collaberator to a suite at a top hotel.
Whilst on a mission to collect items from Lt. Col. Withertons bomb damaged house, Potts is arrested for looting and threatened that he may be shot. Lt. Col. Witherton is unable to vouch for him as he's lost his memory following a bash on the head.
When it seems that someone has planted a radio jamming device above the map room Potts volunteers to investigate and ends up having to defuse an unexploded bomb.
Churchill has an injured foot and Potts is assigned to push his wheelchair. Unfortunately for Potts he's given a dummy to push around as bait for an assassination attempt.