In the lively wetlands of Australia, Poppy the playful platypus discovers a mysterious golden key buried in the mud. With her friends, including Freddie the Frog and Tilly the Turtle, Poppy embarks on an adventurous quest to unlock its secrets. Their journey leads them to a hidden treasure chest deep in a cave, filled not only with jewels but also with a precious book revealing the secrets of their beloved wetlands. Through teamwork and curiosity, they uncover the true treasures of knowledge and friendship, enriching their understanding of their natural home.