A reorganization within the store forces the staff of the gentlemen's ready-to-wear department to share their floor space with the Ladies' Department. Mrs. Slocombe, head of the Ladies, and Mr. Grainger, head of the Gents, immediately come to loggerheads over control of the center floor display. Mr. Grainger refuses to take down his trousers and put Mrs. Slocombe's underwear in its place. Undaunted, she goes over his head to Captain Peacock, and then to Mr. Rumbold.
Mr. Lucas attempts to send Miss Brahms a love letter suggesting an after-work "get it together". Confusion on who sent the letter and to whom it was intended sets the stage for a lot of misunderstanding. There's also the customers to contend with and Mr. Lucas has a devil of a time fitting them into clothing.
The Department figures have taken a dive and so Mr. Rumbold decides to convene a sales conference amongst the staff. Since the meeting is taking place after hours and off the clock, no one is very motivated to provide any solutions. If something isn't done, someone might lose their job, and that someone is clearly Mr. Lucas.
A transport strike leaves the staff stranded at the store, so Young Mr. Grace offers to let them spend the night on the floor. Tents are set up, but Mr. Lucas has trouble keeping his up. A "campfire" sing along leads to talk of the last World War and the experiences some of them had.
Mr. Grainger's trousers are missing, along with the central display. The staff learns that the space was freed up for the "His & Hers" fragrance display. Mrs. Slocombe is outraged that they went her to take down her underwear and put perfume there in its place. The glamorous salesgirl causes stirrings in the trouser department. When it's discovered that free stockings and ties are given out with every scent purchase, both departments formulate a plan to oust the intruder.
It's pay day at Grace Brothers and the staff realize that their money just doesn't go very far. An opportunity for a bonus arises when a customer loses a diamond and offers a £100 reward. Greed gets the better of everyone, except Mr. Grainger, and soon they're conspiring behind each others backs. Mr. Mash throws a wrench in the search after he damages a jeweled dress, causing a multitude of "diamonds" within the department.
