袭击、侵略!都市上空突如其来的巨大碟型不明飞行物,之后是对地面建筑物毁灭性的打击,瞬间都市内死者超过千人,而从此所经过的每一秒都会有人惨遭不幸。主要攻击人类的,是从不明飞行物上散落的众多残暴生物,通过其好战的性情与大啖人类躯体的行为上,军方断定是拥有植物与昆虫共性的外星侵略者——! Attacks and aggressions! Suddenly huge UFO planes over the city, followed by a devastating blow to ground buildings, instantly killing more than 1,000 dead people in the city, and every second since then has been tragically unfortunate. The main assault on mankind is the large number of brutal creatures scattered from UFOs. Through its militant nature and behavior in the human body, the military concludes that it is an alien invader that has common plants and insects.