Tokyo, 1936. Kichizo, le propriétaire d'une auberge, désire fortement la servante Sada Abe. Au fil de leur relation, Kichizo a des pulsions sexuelles de plus en plus violentes qui vont les entraîner dans une escalade érotique jusqu'au paroxysme de leur passion…

Summer Vacation tells the story of four teenage students who spend their summer vacation at school – unsupervised and untouched by the outside world.

A faction of the Communist Party puts Tokyo rocked by demonstrations that they start. Despite this marked the inner circle of more uncertainty and group sex than determination and morale. When the police forcing them to go underground, and the mysterious Suzuki joins, starts the internal tensions in the group take over.