When their father heads off to New Zealand for a business trip and their housekeeper, Mrs. Coverlet, is called away suddenly to take care of her daughter, Malcolm, Molly, and Theobold "The Toad" find themselves home alone for the summer. They decide not to alert their neighbors that Mrs. Coverlet is gone. After all, they can take care of themselves! But when their money -- and their supply of hamburgers and chocolate ice cream -- runs low, their self-reliance is put to the test. Could stubborn, quirky, six-year-old Toad and his cat provide the key to their survival?