In her treehouse den, Jess is looking at caterpillars. Their main job is eating and they grow bigger and bigger until it is time to wrap themselves up and go to sleep in a chrysalis. She has one and is waiting for it to hatch. Setting off on a Minibeast Adventure, she meets up with some children and together they try to find a caterpillar near their flat. When they find one they have a good look at it and try to pluck up the courage to hold it in their hands. As some caterpillars love to eat nasturtiums, the children plant nasturtium seeds in the hope of attracting some caterpillars to their balcony.