The document tells the story of Pauly, a boy with a unique star on his forehead, who discovers a magical underwater world after being tempted by a water nymph. He visits an enchanted lake, where he learns of the beauty and fragility of this hidden realm, and ultimately decides to return to protect the environment above water. Twelve years later, he fulfills his promise to the nymph and chooses to live in her world, committing to their shared love and care for nature.