Set in 1969 Japan, High school student Kyoko advocates the abolishment of the school uniform, but falls into self-doubt at the realisation that she is just a conformist. Running away from the rioting crowds, she chances upon cafe "A Cappella" and meets three other young people: Wataru, Yunosuke and Emma. As it progresses, their relationship, like the variations of Bach’s music, becomes more twisted and tangled, culminating in the unexpected yet fateful tragedy.