Mackey is enjoying the simple life of a caterpillar, spending his days in the sun and eating parsley in the garden. But he quickly learns that he is due to turn into a butterfly any day now. In an effort to stay a caterpillar, Mackey goes to great lengths and finds himself to be living a sad caterpillar life. A friend encourages him to enjoy the good life and allow the natural changes to take place. You never know what change will bring!