The game takes place in Wakoku, basically modern Japan, 50 years after a war with the Leak koku, a neighbor dictatorship state. 50 years ago Wakoku was the invader and left a big scar in Leak koku, so big that even 50 years later both countries still don’t have any diplomatic ties and feel distrust toward each other.

The game begins in Wakoku with a wave of kidnapping that happened through the country, the protagonist Hayato wake up in a prison cell alone, the last thing he remembers being him out fishing and the mysterious men who attacked him. And he soon finds out that the place he was brought isn’t a simple prison but an entire island full of Leak koku soldiers.

[Edited from Hadler's review]