- In the summer of 1969, Kenji was an elementary schoolboy. He built a secret base in a vacant lot with his friends Otcho, Maruo, Yoshitsune, Mon-chan, Donkey, Yukiji and Fukubee. One of their secret activities included writing in the ‘Book of Prophecy’. In their ‘Prophecy’, the children fantasized that they had to fight villains who were out to conquer the world, bringing about doomsday.
Years later in 1997, Kenji is the manager of a convenience store. He's given up his dream to be a rock star and has chosen to live a regular life, looking after his sister's baby girl Kanna after his sister has disappeared for an undisclosed reason. His boring life is turned upside down one day when his old classmate, Donkey dies mysteriously and then an entire family in the neighborhood disappears.
At the same time, there's a lot of talk about a religious cult and its mysterious leader, Friend. A strange chain of events follow, which exactly duplicate the events described in the ‘Book of Prophecy.’ Kenji and his former classmates are shocked to learn this horrible truth. If things are happening exactly as described in the ‘Book of Prophecy,’ then Friend's intention is to fulfill the doomsday prophecy. And Friend is most likely one of the kids they used to play with...
As the events in the ‘Book of Prophecy’ unfold in their lives, Kenji and his former classmates decide to take on the villain.
Time passes and now it's December 31st, 2000. This is the day described in the ‘Book of Prophecy’ as the day of mankind's demise.