Shimajiro and friends tour the dig bug robot which breaks down in the middle of the desert. Shimajiro meets a girl named Coco who was separated from her mother in a sandstorm, and they look for her together.

Shimajiro and his friends meet Coco, a girl who was separated from her mother during a severe sandstorm. They decide to help Coco find her mother, leaving Dr. Roarson behind to repair the Dig-Bug so they can all go home. This is the fifth movie starring a tiger boy named Shimajiro, and it was screened in movie theaters around Japan. The movie has been conceived to be a child's first movie theater experience, and has been designed in a way that will hold the attention of a young audience throughout the film. Each child is given a cardboard megaphone that they are encouraged to use at various times by the story's characters to cheer them on or shout a particular phrase, and even use as a weapon to thwart the film's villain. The film itself features a wide variety of entertainment, from sing-alongs to dance-alongs, puppet animation, and regular animation. Japanese screenings of the movie come with a short break in the middle, while the lighting and sound in the theater are adjusted to give the children the most comfortable experience possible.