The episode opens to adult-aged Francine and Muffy investigating at a residence. Francine records her voice as she and Muffy are looking for an important clue inside the house. Prunella's voice is suddenly heard, to which Francine at first mistakes for a talking rake. An adult Prunella reveals herself from the shadows, claiming that she understands a secret about the President. Prunella tells Francine and Muffy to check the files under Lakewood Elementary, stating that the secret occurred in kindergarten.
At the White House, an adult Arthur is telling the president that his history as the smartest president is secure, but the president, revealed to be an adult Alan (Brain), says that the one person who knows his secret is still out there and it would be bad news if anyone found out. At the same time, Francine and Muffy find the files and find out about Brain's secret, surprising them.
