Commissionaire Buchanan is retiring from the firm he has served long and well. On the way to the personnel department he meets cleaner Edith and feels they have met before, even though they worked in different areas. It turns out that as youngsters they had a brief affair which, unknown to Buchanan, had resulted in twins, killed in wartime Italy. They arrange to meet again. In personnel Mrs Vealfoy interrogates Buchanan to make sure he is taking nothing of value with him. He lets slip that he has a grandson (fathered in Italy by one of his sons) and she is bothered because Records have no record of living descendants. She asks him to send the grandson's address so she can forward some of the company's literature. At the leaving ceremony Buchanan is presented with an electric toaster and a clock.
Mrs Vealfoy is visited by Debbie, a typist, seeking advice because she is pregnant by one Ray whom she hardly knows. Mrs Vealfoy says not to worry; she'll soon fix it that she will be married.
Buchanan moves in with Edith, meets unemployed son Ray, and while up in Ray's bedroom convincing Ray that he ought to seek a job with the company, finds Debbie under the bed. Mrs Vealfoy, armed with Ray's address, visits Edith and asks for Ray to visit her - he says he intends to marry Debbie.
There is an embarrassing get-together of ex-employees at the firm's recreation centre, and while Edith is later examining Ray and Debbie's wedding photos, Buchanan dies. At the next get-together Mrs Vealfoy announces Buchanan's death after which the band plays 'On the Sunny Side of the Street' and the employees sing and dance.