During a light rain, a child dozes on a sandy ocean-side beach, snuggling in her mother's arms. But while the sand beneath her is soft and still, there's a whirlwind of activity in the sea next to her. The waves roll back and forth to shore, while beneath them a busy underwater world is teeming with life. As the girl sleeps, she dreams of participating in that world. Through lyrical text, young readers go on an exploration of our oceans and the many creatures and ecosystems found there, from migrating whales to elusive eels to the colorful coral reefs.