Siblings, Jack and Annie, discover a tree house full of books while exploring one afternoon. Jack looks through a book about dinosaurs and wishes he could see a real one. Suddenly, the wind begins to blow and the tree house starts to spin wildly. When it finally stops, Jack and Annie open their eyes to find they have been transported back to the time of the dinosaurs. Jack and Annie have a harrowing adventure, befriending some dinosaurs along the way as they try to make their way back home.