In 1925, the Duke of York(Colin Firth) is stammerer and has troubles to speak to the public. His wife Elizabeth(Helena Bonham Carter) seeks the treatment of the speech therapist Lionel Logue(Geoffrey Rush)that follows unconventional methods and relationship, and Bertie gives up the treatment on the first day. However, after listening to the session that was recorded by Lionel, the Bertie returns to the treatment. In the mid 30's, the Duke of York is forced to assume the throne of England as King George VI due to the abdication of his older brother King Edward VIII. Immediately after, there is a crisis in the government and England declares war to Germany. King George VI needs to make a speech to his compatriots, and his friend Lionel helps him using an unorthodox technique.