A married woman's heart and body tremble in the hot spring waters, swaying with forbidden desire. Unfulfilled in her marriage, she embarks on a hot spring trip that awakens new emotions within her. Her husband is conservative and controlling, refusing to let her meet friends or work part-time. Despite being newlyweds, a deep rift has formed between them, widening the emotional distance. Though outwardly gentle and calm, she secretly harbors resentment and rebellion toward her husband. Deprived of freedom, she yearns deep inside: "If I could be free, I want to be free." On this journey, she meets a man for the first time, and despite her shyness, she spends a passionate night with him. This story captures the transformation of the married woman's heart and her intense longing for liberation.