"In the middle of the big city, there was a tired, ugly place that made Mr. Green feel very sad." So begins this uplifting and charming story of the magic that can happen when young people, older people, and plants come together. Mo has lost his father. But as he helps his neighbor Mr. Green create a beautiful garden in an abandoned, forlorn space in the city, a smiley feeling grows inside Mo and he learns that a garden can be a very good place to remember people we've lost and how nature is good for our mental health.