LeClerc and Fanny are brought down in the town square after the helium runs out, where they are then arrested and sent to prison. Edith manages to forge her own papers to release Fanny and LeClerc just as von Smallhausen has himself arrested to interrogate the couple about the British airmen. Ultimately, the forged papers are discovered, and the newlyweds hide back at the café. Unfortunately, their spring-loaded Murphy bed has now pinned them behind the wall.

Monsieur Alphonse, who made the Murphy bed, arrives to pry the couple out while Mimi tries to feed them soup through a hole using a bellows. Meanwhile, von Flockenstuffen reveals his plans to kidnap Churchill, pulling rank on the recovering von Klinkerhoffen. Herr Flick has von Smallhausen sprung from prison and the pair arrive just as the dynamite goes off in their faces and frees the newlyweds. That night, as von Flockenstuffen is being entertained in the café, Helga and Bertorelli spring von Klinkerhoffen. Von Flockenstuffen demands to visit the cellar, taking with him one of the dynamite candles. Von Klinkerhoffen arrives to relieve him just as the candle goes off.

René is to be given a collaboration medal for his help with the removal of von Flockenstuffen. Unfortunately, this causes the Communist Resistance to place a price on his head. He decides once again to elope with Yvette. Michelle orders René to take the airmen to the monastery to be picked up by a lightweight plane. Herr Flick also learns of this news, and he and von Smallhausen have themselves initiated into the brotherhood to gather information and capture the airmen. Unfortunately, René ends up grabbing Edith's hand instead of Yvette's, as the two are rushed aboard the plane bound for England.

René and an airsick Edith land in England where British Intelligence tries to find out why they aren't the airmen. An officer from Deep Intelligence is brought in, and he turns out to be none other than Hans Geering. In the intervening time, Hans has become a British citizen with his knowledge of the Nazi army. At No.10 Downing Street, Churchill desires to meet René and Edith, who he awards medals and citations. However, Edith decides to return home after discovering that Fanny and LeClerc are ruining the bar. They are flown over Nouvion, the bomb door opens and the two of them are dropped out of the plane, arriving back at the café just before they are to be arrested for being out past curfew.

The airmen are smuggled out of the monastery in sacks of potatoes. Michelle comes up with a new escape plan which involves building a raft out of telegraph poles. General von Klinkerhoffen decides to restart the local newspaper. Rene and Monsieur Alphonse are ordered to organise it.

The Germans have found out about the telegraph pole escape plan, so the Resistance plan to use wine barrels instead. Michelle decides to steal the painting of the 'Fallen Madonna' from Herr Flick so that it can be sold to raise funds for the Resistance. René and company tunnel into Herr Flick's office just as Colonel von Strohm, Lieutenant Gruber and Captain Bertorelli break in. René gets covered in flour and Gruber thinks he's being haunted by Rene's dead 'twin brother' again. The Germans run away and René steals the painting.

The barrels which are to be used in the latest escape plan are hidden in the cellar of Café René. René has to give the painting of the 'Fallen Madonna' to Colonel von Strohm. The painting then falls into the hands of General von Klinkerhoffen. The General decides to have his photograph taken at the café so that it can be published in the newspaper. He asks to see the wine cellar. When he finds two large wine barrels, he orders them to be taken to his château. The airmen are hiding inside the barrels.

General von Klinkerhoffen thinks that a mixed marriage between a Frenchwoman and someone from the occupying forces would provide a good propaganda piece for the newspaper. He decides that Captain Bertorelli should marry Edith. A party is arranged at the château so that local dignitaries can meet the 'happy couple'. The Resistance rescues the airmen from the château via an underground river. The airmen end up stuck in a sewer underneath the town centre.

Michelle decides to use René's old ice cream truck to rescue the airmen from the sewer. The truck is parked over the sewer grate and Monsieur Alphonse hides underneath so that he can prise off the grate using a chisel. General von Klinkerhoffen decides to buy some ice cream but ends up covered in it when the winch which is being used to raise the sewer grate causes the pump on the ice cream maker to get stuck full on.

The ice cream truck plan has failed, so Michelle suggests holding a gypsy fair in the town centre. Herr Flick has the painting in General von Klinkerhoffen's office replaced with a forgery. The General discovers the forgery and has Colonel von Strohm, Lieutenant Gruber and Captain Bertorelli arrested. René poses as a gypsy fortuneteller in the tent over the sewer grating. A séance is held during which the airmen finally break out of the sewer. Three more airmen emerge from the sewer - apparently they've been lost down there for weeks.