The Japanese decide to open what we would call a "summer camp" on one of the outer islands. Leaders, counselors, and a few teenagers from Japanese schools - pretty much the full picture of "pioneer life. But soon, a civil war breaks out in one of the provinces. On the island begins to go God knows what. The men of the camp, assemble a team to return to the mainland to find out what's going on there. After a while, they are shipwrecked and forced to return to the camp. With a sense of hopelessness, the guys begin to go mad, well, and take out their anger on the asses of the local girls ... Soon, a squad of militia from the mainland lands on the island ... And by evening, the whole "hungry army" begins to let the local girls go around in circles.