When an earthquake rocks eastern Japan, mysterious invaders start to silently infiltrate all elements of society. The invasion is discovered by an elite group of four female assassins known as the danger dolls. The members of the danger dolls arisa, rei, mari, and miki possess extraordinary martial arts and swords skills and their mission is to protect society from evil. The danger dolls target a powerful cult whose members are helping the invaders. After disguising themselves as a pop idol group in order to infiltrate the organization, the danger dolls must locate and destroy its leaders before they open a wormhole giving the invaders unlimited access to destroy our world!