Elena, an eight-year-old girl has just one day left of her summer holiday, and she still hasn't finished her homework. Her homework is to DO something to save the Earth! She gets an idea from the news on TV on the last day of the holiday, but to complete her homework, she has to go to a farm. She can't go alone, she needs someone's help, but there is no one home but her strange grandpa. Can the two successfully finish her homework?