England has declared war on Germany, forcing Bertie to make an important speech to the nation, at short notice, that will be recorded in the history books. Logue rushes to the palace to help Bertie prepare.
The King enters the recording 'studio', and everyone else leaves apart from Logue. They practice the rhythm of the piece, until Logue stands before him much like a conductor, and Bertie performs when the red light switches on. Slowly he makes his way through the transcript without many problems.
As it ends, the speech has been a success - the nation is galvanised, and radio operators around the world cheer. Logue does state that he stumbled on a "W" -- Bertie said he had to throw that in there, so they knew it was him.
They leave the room and the King is congratulated by everyone, especially Churchill who says he couldn't have done a better job himself.
As it ends we're told that Logue was awarded one of the highest honours for assisting the King. And they both remained good friends until the King died.