There Old Bill helps his son dig a Universal Carrier out of the mud and meets his long-lost friend Canuck, a poilu in the previous war and now a hotelier, and his daughter Françoise.
Young Bill bids farewell to his father, stating that his affections have returned from Françoise to Sally, just before joining a squad from the regiment on a raid to capture a German prisoner.
They march the prisoners back to base together as Canuck and the two Bills discuss the differences between German soldiers and those of free nations such as Britain and France.
In contemporary reviews, The Manchester Guardian wrote, "The plot is a disconnected business, a series of episodes of the sort we usually call picaresque when we really mean stragglesome.
It is, in fact, as glaringly unkempt and untidy as Old Bill's famous moustache which that delightful actor Morland Graham wears with conviction and distinction," and The Sunday Express wrote, "chalk up a hit for Morland Graham on this picture as Old Bill...it's an amusing highly sentimental affair written in the authentic language of the Front with no attempt to be subtle...a pity to see so fine an actor as John Mills in so empty a part.