On one tropical island, where summer always reigns and even in the most inclement weather you can do without a hat and warm clothes, there lived a chipmunk named Sim. He lived in a garden with many fruit trees near the sea. His home was a small but cozy hollow inside a mango tree. Sim was the most ordinary chipmunk and led the most ordinary chipmunk life: he ran, played, ate sweet fruits; in general, he lived for his own pleasure and little bothered him... until a story full of dangerous adventures happened to him. And it all started on an ordinary morning, exactly the same as each of the previous ones...