Every year the rains come during late Budding Season. This time the weather is so extreme that the Council orders an evacuation All that are able take refuge in the Mushroom Cave at the far end of the Terraces but Pippy Pippin and Tom Fluff risk everything by trying to rescue Nan Moss, the old doe that lives at Dam Bottom Cottage. At the end of the Budding Season, the Blossom Tree Celebration is held on the Dance House lawn. Preparations go well until Walter and Min have an argument that leads to the loss of the day's drink supply. Pippy volunteers to help whilst leaving the twins with Mr and Mrs Fluff. However, the twins get locked in the Drink Factory on their own and spend an evening trapped until rescued by Pippy. Next day, the Celebration takes place with a surprise ending.