Lou and her friends are brave adventurers. They run faster than airplanes. They build mighty fortresses. They rescue wild animals. But one day, when they're looking for a ship to play pirates in, Lou's friend has an idea: Up there! The tree can be our ship! Ummm ... says Lou. This is something new. Lou has never climbed a tree before, and she's sure she can't do it. So she tries to convince her friends to play a not-up-a-tree game. When that doesn't work, she comes up with reasons for not joining them ... her arm is sore, her cat needs a walk, you shouldn't climb so soon after eating. Finally, she tells herself she doesn't want to climb the tree. But is that true, or is this brave adventurer just too afraid to try?