One morning, Fletcher confronts his fellow inmates with news that a tin of pineapple chunks, which he had smuggled out of the prison's kitchens by Godber, has since been stolen.
The next morning, Mr Barrowclough visits Fletcher in the library and reveals he took the tin during a random search of his cell under Mackay's orders.
Barrowclough decided to let him off the hook upon finding it by not disclosing it to the other officers involved in the search, but made the unwise decision of taking it home, whereupon his wife consumed the contents.
Later that day, Godber decides to steal another tin for Fletcher during his kitchen duties and asks fellow inmate Lukewarm to create a distraction to help conceal the act.
Unbeknown to everyone, Barrowclough discretly arrives and replaces the stolen tin with the one he bought, leading to Mackay scolding the officer who raised the alarm for wasting his time.