One morning it appeared, out of nowhere, sitting right outside Stella's house – a broken, old bus. On the front, held up with packing tape, is a hand-painted sign: "Heaven".

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?