In Plain Mister President, the audience is transported to April 1789, a time of great anticipation as General George Washington prepares to assume the presidency of the newly formed United States. The air is filled with the promise of spring, and the nation is eager to celebrate its first national holiday. However, Washington's heart is heavy with the knowledge of the immense responsibilities that await him. As he departs from Mount Vernon, he shares a poignant farewell with Martha Washington, who urges him to smile, revealing the emotional toll of his impending journey.