One autumn day in a small and colourful street corner, an inconsolable little girl loses her prized possession: her fluffy teddy bear. But down the road, a tiny grey mouse, Kanku-bouya, finds it, as the vibrant and lively posters on a forgotten street nook come to life with the enchanting music of a young violinist and his pianist pair. However, not all posters are kind and well-meaning, furthermore, the toy is still missing. Will the sad girl ever find her beloved teddy bear?