Sid and Vic have get into a gambling debt with local farmer and big head Jack Barclay. It's double or quits: whoever can get the clearest milk from there cow. It's down to Fanny the cow to save the day.
Sid and Vic have a big heavy minus in there bank, so they invite the bank manager for tea to try and come to some kind of settlement, but to get a good settlement, they try to get the bank manager drunk.