How did it get there? everyone wonders ... but no one knows. Then, out from the shadows steps Stella, normally so shy. She climbs onto the bus and, in a moment, sees everything that it could become: "This bus could be ours," she says. And so, the lonely old bus - with the help of some colourful graffiti - becomes a hub of activity! People come together to hold meetings, play games and share stories; sparrows nest where the engine used to be and snails make their little homes under the tires. But one day a tow truck arrives and threatens to take away not just the bus, but everything that everyone has worked so hard to create. Can Stella save the day?