It is June 2006, and, after school lets out for the summer in Crown Point, Indiana, five boys find out about a robot in Texamilio, a supposedly fictitious island due west of the eight Hawaii Islands. When they meet Rockybado and his two close Bobino comrades, they are all confronted by Susan and Claude McSmith, who are both out to steal Rockybado's position as King of Texamilio, after a sour debate regarding physics in high school.