Working as a maid at a long-established inn, Yukino becomes increasingly entangled in daily sexual affairs driven by her desire for inheritance, all while fixated on her son Haruo. Meanwhile, the head maid Chiaki grows deeply resentful of Yukino's actions and seeks to seduce Arisue, a regular guest who knows Yukino's true intentions. As Chiaki plots to take over the inn, her schemes grow ever more intricate and intense.