In a beautiful mountain stream, many creatures lived in harmony, including the protagonist, Little Fish. One day, Little Fish's friends argued over what game to play, leading to a fallout where they ignored each other. Kwun Yum, saddened by the creatures' anger, decided to return to her home at the mountaintop. As she left, the sunlight faded, the stream dried up, and the creatures fell ill one by one.

Determined to save his companions, Little Fish resolved to climb the mountain and seek Kwun Yum’s help. However, no matter how hard he tried to leap upward, he kept falling back into the stream. Will Little Fish finally meet Kwun Yum? Can he rescue his friends? What fate awaits him?