” is hard to summarise, not only because of the nonlinear plot that jumps from past to future and vice versa, but also due to the links and effects that each moment of the manga has.

Generally, it can be said to be about a group of friends, who, during the summer of 1969, decide out of boredom, to build a secret base and represent their “gang” with a symbol. Here, Kenji, Otcho, Yoshistune, Maruo, Donkey and Yukiji gather and let their imagination run freely; they fantasize about defeating villains who want to destroy the world and collect these stories in a book that they will call “The Book of Prophecy”. So far, this seems normal, but there is one problem: the symbols that represented their friendship will reappear again in the late 1990s, but this time they are being used to represent a new mysterious cult that is slowly spreading across Japan and that is led by a masked man called “The Friend”.