Drawing influence from the street musicians of Miyagi, four high school students form a band and spend their free time practicing for their school's upcoming festival. When the festival is abruptly concealed, they come up with a dimwitted strategy of faking a bomb threat to the school in order to force the principal to change his mind. Their plan seems to work at first, but when a real bomb goes off, the group is forced to take responsibility for the explosion and they are kicked out of school. ...