Grandma Jax is a sprightly, skateboard riding, ex stock car racing grandmother. Pipi Georgia is a 7-year-old girl who, due to unusual family circumstances, lives with an unpleasant, grumpy aunt. When Grandma Jax and Pipi Georgia meet by chance, a special friendship develops and Grandma Jax arranges for Pipi Georgia to live with her. One day, while picnicking by the river, they discover a mysterious envelope in a strange place, which leads them into an unusual adventure as they try to work out the puzzle of the red envelope and claim a most unusual prize.