On Kinmen Island, a solitary otter named Olu lives for his collection of shiny treasures. One day, his lakeside home is destroyed by human construction. Devastated and determined to find a new home, Olu sets out with a large backpack. Journeying across rugged landscapes and hidden ruins, he discovers a world where history meets nature. Along the way, he encounters the island’s diverse wildlife and a female otter named Cleo. Together with his new friends, he faces environmental threats and comes to realize that home is not a shell to hide in, but the courage to let go and embrace the world around him.