Hitomi and Chiharu are mother and daughter. Hitomi has lived a strict, ascetic life, working hard alone to raise her child. Meanwhile, Chiharu spends her days obsessively masturbating. One day, Hitomi catches Chiharu in the act, leading to a shocking confrontation. Afterwards, the two set off on a trip to Kagoshima to commemorate the first anniversary of Hitomi's brother's death. During their journey, the emotional tensions each has been harboring begin to surface.