The Peanuts gang has built a wonderful new tree house! Everyone wants to share it—everyone except Lucy, who takes over the tree house and says everyone has to obey her. But Charlie Brown and the others don't want to be ruled by Lucy! Luckily, Linus remembers how the American colonists stood up to the British King a long time ago with the Declaration of Independence. Can the Peanuts gang learn from the colonists and stand up to Lucy?