The sausage containing the painting of the Fallen Madonna, which was taken by Lieutenant Gruber's dog, is minced by the Lieutenant – but fortunately he discovers it first and saves it. At the same time, the missing knockwurst means that Monsieur Alphonse cannot get back the money which he leant to pay the ransom of the kidnapped sausage. The Resistance pays him back with Monsieur Leclerc's badly forged money. But after everything seems to be getting back to normal, the sausage is sent to Lieutenant Gruber to make another copy. Also, Michelle's latest plan to get the British airmen back is by an old plane with the motor from general von Klinkerhoffen's lawn mower.

After Maria is sent to Lieutenant Gruber with the sausage containing the real painting of the Fallen Madonna for copying, she is caught by General von Klinckerhofen, who places the sausage in his wardrobe and helds Maria hostage until his lawn mover engine is returned by the Resistance.

Herr Flick, the Colonel and the Captain, and René hears about this and decides to go to the chateau through the secret passages and steal the sausage from under the General's nose, using Helga, Yvette and Lieutenant Gruber as erotical bait.

With René again in the possession of the sausage containing the painting of the Fallen Madonna, the attention turns to getting the two British airmen out of France. Michelle proposes a steam engine tour through Nouvion. Michelle's newest hairbrained scheme of getting the airmen out will of course need 80 meters of suspenders, and it's René's job to get them from every Frenchman in Nouvion. Herr Flick and Helga arrive in his staff car to spy on the show.

After the plot to get the two British airmen out failed, a frustrated René returns to the painting of the Fallen Madonna. He hides it behind an ugly painting in his café which is immediately recognized by General von Klinkerhoffen as a Van Gogh and requisitioned for his office in the chateau. He also requistions the two new maids in Café René – or as they are better known: the two British airmen in disguise.

Realizing that the two airmen will be recognized right away, Michelle of the Resistance comes up with another hairbrained scheme of digging a tunnel from Monsieur Alphonse's morgue into the prisoner of war camp and smuggling in the two airmen into the camp.

While the Captain is sitting in the café, herr Flick from the Gestapo is listening when René is talking to London on the wireless. He soon cracks the code surrounding the message with the plan to dig a tunnel from the mortuary to hide the British airmen.

But it's soon apparent that the two airmen and Monsieur Alphonse need help with the digging, and the café staff are called in, leaving Madame Fanny and Leclerc in the café. But the Colonel and the Captain follow René, discover the tunnel, and are captured in the prisoner of war camp.

There is still no batteries for the wireless radio underneath the bed of René's mother in law, so Michelle's newest hairbrained scheme is to have René and Yvette powering the radio with the generator from a bicycle until the stolen batteries from a German midget submarine are delivered.

The Lieutenant is finished copying the paintings (The Fallen Madonna and the Van Gogh), and delivers them as sausages. Sausages also comes from Captain Bertorelli (real ones), Monsieur Leclerc (submarine batteries), and Officer Crabtree (explosives), and soon they're all mixed up in the German officers pants.

Armed with a camera disguised as a potato, René has to get into the chateau so he can photograph plans for the German invasion of Britain.

René and his staff prepare the long-distance duck for its vital flight to England.

Monsieur Leclerc comes to the rescue when orders are given for René to be arrested. René tries to escape using a unique disguise.

Chaos engulfs René as he attempts to hide the stolen gold. Meanwhile, the Resistance plan to steal the Enigma encoder.

Two years have passed. The airmen have finally escaped to England and Captain Bertorelli and his Italian troops have gone home. René thinks life is now relatively peaceful. Then Yvette announces that she's pregnant.

Colonel Von Strohm and Lieutenant Gruber get Helga to steal the painting of the 'Fallen Madonna' from Herr Flick. She cuts off one of the boobies and keeps it, to make sure that she'll get her 'cut' when the painting is sold.