Siblings Buddy and Sally Mason are gearing up for a long and boring summer break when adventure presents itself. The duo's cousin, Ranger Carol Mason invites the pair to spend an entire an summer living and volunteering in the world's oldest national park, Yellowstone. It doesn't take long for adventure to greet Buddy and Sally who, under the supervision their cousin Carol and expert tour guide Nate, learn about the history, geology and wonders of Yellowstone. Whether exploring the backcountry, viewing wildlife, taking side trips to Grand Teton, watching Old Faithful erupt or a enjoying a wide variety of other adventures, Buddy and Sally's have a summer vacation packed with fun and excitement while learning about the preserving and protecting of Yellowstone.