Dozing off while contemplating Grandpa's unusual vacation, Kate dreams about Chewandswallow, where it snows popcorn and rains sandwiches and the fate of falling food intrigues her.
When astronauts land on Mars, their first discovery is a substance not unlike pie filling and Kate and Henry are eager to go taste some, but Grandpa, who may have some inside information, discourages them.
Life is delicious in the town of Chewandswallow where it rains soup and juice, snows mashed potatoes, and blows storms of hamburgers--until the weather takes a turn for the worse.