Follow the Tree House Club to 2580 BCE, where they find there's more to the mystery of the Great Pyramid than they ever suspected. A building project at Harry's house prompts Keith to reveal his inner architect and gives the Treehouse Club an idea for their next adventure. They're off to see the most awesome building project of all time... The Great Pyramid. Their journey will take them further back in time than they've ever been before. To ancient Egypt, four and a half thousand years ago. Getting to know the people who built the Great Pyramid busts a few myths about the ancient Egyptians, as well as reveals the magic of their everyday lives. What will the kids discover at the site of the world's most iconic monument? Why is the priest, Setka, out to get Keith? And how can beliefs destroy, as well as create?