Every Christmas Mia and her family read a letter which her Grandpa wrote to her. His letter is a warm, impassioned and heartfelt wish for a better world for Mia to live in. He remembers fondly the times they spent in his garden finding frogs and worms and planting seeds. But Grandpa worries that all the things they love so much are in danger . . .?His letter is a hopeful plea to Mia (and to all of us) to continue to care for and protect our precious world.