The phrase "a last plea" is correct and usable in written English.
It can be used when someone is making a final request or appeal, often in a desperate or urgent context.
Example: "As the deadline approached, she made a last plea for understanding from her colleagues."
Alternatives: "a final appeal" or "a last request".
In a memo written in 1969, in his final days at the department, Thomas made a last plea that someone go back to Mexico.
The two men worked the phones and at a closed-door party lunch made a last plea to fellow Democrats to stand with them.
Before leaving Clark Air Base for Guam, Mr. Marcos told American officials he had made a last plea to Mrs. Aquino's supporters to be allowed to retire to his home province of Ilocos Norte, in northern Luzon, a senior State Department official said.
They argue that Mr. Cahill was denied a fair trial because a flood of news coverage in central New York prejudiced jurors against him, and they say he was wrongly denied the chance to make a last plea for mercy, as is permitted in some states.
One of Mr. Traficant's colleagues in the Ohio delegation, Representative Steven C. LaTourette, a Republican and former prosecutor, made a last plea for the House to delay its decision until September, after Mr. Traficant's expected sentencing next week and after courts could hear some of his legal motions seeking a new trial and other relief.
A brief recently submitted to the Court of Appeals by defense lawyers in the second case argues, for example, that people facing the death penalty in New York should have the right to make a last plea for mercy before jurors consider execution.
Minutes before Forrest delivered her decision, Ulbricht reportedly made a tearful last plea for leniency to the court.
In 1939 Moscow openly gloried in military cooperation with Germany for the destruction of Poland, "that ugly offspring of the Versailles Treaty," and Ribbentrop in his last plea quoted a cable of congratulation from Stalin as proof that the Soviet Union had not then regarded the war against Poland as an aggression.
Because that is the way it should be". In some ways, this last plea of a palace worker was heeded.
A last word a plea really.
But really they're a last desperate plea for a train-track world in which men serve a useful function.
