A satanic program is activated aboard a crowded commercial flight headed for Tokyo. It releases a swarm of invisible demons that send the aircraft plunging to a fiery doom. Everyone aboard is killed instantly – except Akito Kobayashi
– owner of the devilish program and sworn ally of hell itself!
Kojiro Soma, an old elementary school friend of Akito’s, is surprised to see him enroll back in school. Kojiro notices how this once lonely boy has grown into a suave and arrogant teenager. Later, when his classmates are attacked and the legendary demons return to stalk the streets of Tokyo, Kojiro begins to truly understand what his old friend has become.