Gloria is court-martialled for hitting the sergeant-major, his punishment being he can never play Ginger Rogers again. Then Parkin takes a Morse code message. The men are to supply a bridge to take medical supplies, so, after the predicted trial and error, a shaky rope bridge is eventually built. However, when the doctor arrives it seems that Parkin blew it again. The request was for a fridge, not a bridge, which is just as well as the men's feeble effort collapses with them on it, requiring the doctor to rescue them with an existing pontoon bridge which was fortunately there all along.