It is a big gardening day, and everyone in Martin and Sylvia's family is feeling grumpy. The air seems heavy and hot and sticky, and brother and sister don't want to work. Daddy can't find his belt, and Momma is concerned about the weather. What are they to do? When the sky darkens and it starts to rain, everyone scrambles to finish the gardening. But with the pouring rain, and some family silliness, they find that their grumpies are washed away.