Gombe, who falls from trees even though he is a monkey, is a descendant of Son Goku. Gombe's father tells Gombe to let his cute child travel, and sends Gombe to work for an uncle in Tokyo. But he doesn't have a ticket to Tokyo! After thinking about it, Gombe consults the station master and decides to work on the train and be given a ride to Tokyo. The training journey of the slightly clumsy and cunning Gombe has begun!