The Squirrels are helping Duggee in the garden when Tag makes friends with a caterpillar. This caterpillar is very hungry, so Tag feeds her all the vegetable leaves they have been picking. She eats and eats and eats and gets bigger and bigger. Wow! The other Squirrels are really keen to play with her too, but Tag's caterpillar friend is suddenly very tired and needs to sleep. The Squirrels are also a bit sleepy, time for a nap! When the Squirrels wake up, they cannot find caterpillar - she has disappeared. In her place, as if by magic, there is someone else. How did that happen?