A gigantic ship suddenly appears over Tokyo Bay, prompting a state of emergency. In the midst of the chaos, Nobuo Koyama, who works at a publishing company, gets caught in the spaceship's crash. 
The "Asterisks" that 
appeared at the same time
Quatre ans plus tard, les astérisques
ont mis fin à notre société.
Quattro anni dopo la nave è esplosa e
sono improvvisamente apparsi gli Asterischi,