Eleven-year-old Sarah loves spending her summer vacation with her grandmother! Sarah is happiest when she has her grandma all to herself because she always has lots of fun things planned for them to do together.

Sarah learns how to bake, explores her grandmother's house, listens to stories of days gone by, and helps in the garden. But one night when her grandmother asks her to watch for lightning bugs and then tells her a fascinating story, Sarah is left to wonder if maybe, just maybe, the creatures that fly around the garden are not what they seem.

Sarah's Summer Vacation shares the tale of a little girl's trip to her grandmother's house where she learns her imagination is a powerful gift that can make the world around her come alive.