Grace's great-grandma used to enjoy her garden and kept it looking gorgeous. Now in her nineties, Great-Grandma can no longer do gardening, and when Grace overhears her grumbling about this, it makes her feel sad. So Grace makes a plan. She joins a gardening group at school so that when she becomes a good gardener, she can make sure that Great-Grandma's garden gets a makeover. Grace's plan is successful, and Great-Grandma is so happy when her garden looks gorgeous again that she throws a garden party to celebrate.