 At Shinonome High School, Makoto, a mild mannered engineering prodigy is working on a special science project with some help from his girl friend, Nanami, an entrepreneurial whiz as passionate about her work as Makoto is at his. Unfortunately, her brother, Jinnai, a mega-maniacal cheat who irrationally thinks that Makoto is out to ruin his every ambition including his corrupt school presidency, has other plans. He tries to sabotage Makoto s device when Makoto catches him. In the ensuing struggle, the rewired machine opens a dimensional portal that throws Makoto, Jinnai, Nanami and their history teacher friend, Mr. Fujisawa into the world of El Hazard. Once there, Makoto and friends struggle to find a way home with all the help that a princess they meet, Rune Venus of Roshtaria, can give them as well the special powers granted to each of them as a by-product of the trip. At the same time, they must also stop Jinnai, who has allied with an enemy nation, called the Bugrom to conquer El Hazard.