No one is as big and strong as the Bear! His roar makes the little animals shudder with fear. He is the king of his picture book - when suddenly, his world is upside down and he finds himself tumbling through the pages. On his search for the way home he meets the inhabitants of other childrens' books—but why is everyone suddenly so much taller than him? One thing is sure: On his own, it will be difficult to find the way back into his own book.