The youngest capybara is lost. Her family asks several animals, but they can't find her. Where could she have gone? 
The capybara family decides to visit their cousins, but it's a long and tricky journey over the mountain. Daddy Capybara suggests they walk in single file but when Cappie comes across the most incredible butterfly she's ever seen, she can't help but chase after it. "Where's Cappie?" her brother asks. The whole family searches for her and asks different animals: a deer, an armadillo, and even a fearsome anaconda! But none of them can help. Will they find Cappie?
The dangers of the forest lurk for the endearing capybara family. Will they be able to reach their destination safe and sound?