Rather unexpectedly, Prudence has been offered a promotion - a secondment to another department.
As is traditional, she had a farewell afternoon tea at her old one.
One of her favourite now-ex-colleagues expressed his disappointment at her leaving the department for the second time.
"If you want to come back, tell me whose job you want and I'll push him down the stairs."
Prudence is absurdly flattered, if not a little concerned that he might go through with his... offer.