Sam is a tree. A willow tree. And he is bored to death, upright, alone on the pavement in the middle of this big city. In spite of the company of the birds, the roadsweepers and the neighbourhood children, he needs to feel close to friends of his own species. It's not easy for a tree to feel itself without root. For Sam not passing away of tiresome loneliness, the children will act as little gardeners to give him company. From seeds to shoots, from cuttings to buds, a garden will grow and push the concrete away. A garden in the city.