One morning it appeared, out of nowhere, sitting right outside Stella's house - a broken, old bus. On the front of it, held up with packing tape, is a hand-painted sign that says, "Heaven". Heaven is endorsed by Amnesty International UK. 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 tyres. 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?