This series takes place in 1991 on the Earth Ship, the command center of an international defense agency called Sky Force. In the ship, scientists have developed "Birdonic Waves", a newly developed technology which gives the subject superhuman abilities. The experiments called "J-Project" were successful. Five elite Sky Force officials from Earth were chosen to use this technology.
However, the Earth Ship is suddenly attacked by Vyram, an evil outer-dimensional organization bent on inter-dimensional domination. After the death of a potential super-soldier and the misfire of Birdonic Waves across Earth and onto four civilians, a search starts for the remaining Jetmen.
