Octo Annie, an octopus, lives in a great big glass tank at Underwater World until one day she becomes part of a real family. The Martin family of two parents, two sons, and two pets are all surprised by their new addition, Octo-Annie. With Octo-Annie's eight arms, the Martin family's move to a new house is accomplished. But something and someone is left behind...

Two children and their mother discuss what is the greatest treasure? The children believe that it is the riches and gold. The mother relates the story of Gamal and how the spirit of the cave showed Gamal that water is truly the greatest treasure.