In a world where reality intertwines with fantasy, a resourceful working-class boy named Timmy experiences a summer of dreams. After a fall into a stream, Timmy plunges into a magical adventure where the inhabitants of the aquatic depths come to life. In this underwater realm, filled with extraordinary creatures and a touch of humor, he encounters a group of babies who inexplicably have the ability to swim and communicate with him.
As the story unfolds, Timmy becomes the unlikely hero of this group of adorable "Water Babies" who are seeking a way to return to the surface. Over time, he realizes that the babies are not just charming beings, but also hold a profound secret that could change his life and that of his family forever. However, not everything is fun and games; the evil Mr. Grimsby, a greedy industrialist, is determined to seize the hidden secrets of this magical world and destroy the innocence of the young.
With the help of his aquatic friends, Timmy must find a way to protect the babies, facing numerous obstacles and dangers along the way. This delightful blend of humor, adventure, and lessons about perseverance and friendship invites us to reflect on the power of imagination and the bonds we can form, no matter how different we may be from one another.