The quiet of daily life is shattered by a sudden event. As mother Tsuneko is doing the dishes, her son sneaks up behind her and begins groping her breasts. Startled, she scolds him, but the son silently continues fondling her chest. Overwhelmed by this unexpected act, Tsuneko is left confused and collapses onto the floor. The thread of forbidden desire slowly begins to entangle them. An unsettling tension lingers, disrupting the tranquility of their everyday lives.