In the depths of the sea, the little sperm whale wonders: He swims every day through the vast, wide ocean, but he has never been to the depths. What could be happening down there? Perhaps something strange, something mysterious, or something big? "I'm going now," says the little sperm whale to his parents. But Mom and Dad forbid him to dive into the depths because he is still far too small for that. However, "those who are small can dive a little deeper," thinks the little whale and curiously sets off into the darkness. There, he meets friendly underwater creatures: playful dolphins, a cod, and a cleaner shrimp. He makes friends with them, and with each encounter, the little adventurer feels bigger, stronger, and braver. And those who are big, strong, and brave can dive a little deeper. Deeper and deeper, down into the darkness, until there is no further way to go. But.