Douglas and Scotty Melcher are exploring a mountain meadow in the Gallatin Valley north of Yellowstone National Park when they’re caught in the open by a severe storm that blew up unexpectedly over the mountains. They run to find shelter, When they lean against a huge tree to rest, they hear a voice telling them to come inside the tree. They run to the back of the tree and find an opening large enough for them to crawl inside to safety. Inside, the tree speaks to them and the boys name him ‘Grandpa P’. While they wait out the storm, Grandpa P takes the boys back to 1932 Vermont where their Uncle Orville and Aunt Thelma teach them to make maple syrup. The boys enjoy learning how to make maple syrup, but as the day slips by and it starts to get dark, how can they get home?