When a lonely little boy receives an invitation to play written on a paper boat, it seems that he has found the best friend he's been longing for - at last! But Bear isn't quite the playmate the boy had imagined. If only he knew how to play games properly! But when Bear starts to build a treehouse, the boy is intrigued and a magical summer begins. As autumn passes and the first winter snowflakes start to fall, the boy is left alone, and only then does he truly realise what he has lost ... Until at last spring comes again and the friends are joyfully reunited with a very special hug!