Akane Sakaguchi, who married her current husband at a young age, finds herself trapped in a monotonous life consumed by child-rearing and household duties, with no freedom. Her affair begins when she becomes involved with the store manager where she works part-time. Her relationship with her husband has become sexless, and her unfulfilled desires ignite passionate encounters with the manager. Amid the quiet of a nighttime hot spring resort, their intense physical affair shakes her mind and body to the core. A night filled with raw desire changes her life forever.