Rosie lives in a playhouse with her colourful group of friends. Together they embark on adventures as they learn the meaning of true friendship. The sun is shining and the day's snow is melting when Big Bear awakes from a long sleep and he's ready to play. But when he hears about all the fun everyone has had in the snow, he feels he's missed out... Rosie remembers that there are some last remnants of the snowman they made on Oakley's Hill. Maybe there's enough for one last snowball for Big Bear. But they'll have to be quick - it's melting fast.