It's autumn and the harvest is ready. The robots and Lifty are picking carrots, beetroots and cabbages. There are lots of vegetables, and the robots are tired. They need a combine harvester. Leo and Lea come to lend a hand. There's an old tunnel on the way to the farm. The group can get through, but the combine harvester is too big. It won't fit. What should they do? Leo comes up with a brilliant idea: to take apart the combine harvester and take it through piece by piece.