Yuri, separated from her son due to her husband's debts, arrives at a hot spring rumored to reunite lost loved ones. At the inn, she encounters a male tourist and exchanges greetings. Later, over drinks, she ends up spending time with him. It's then revealed that Yuri and the tourist are actually mother and son, separated years ago. Kenzo, harboring resentment towards his mother for abandoning him, confronts her. Yuri apologizes, but Kenzo, unable to see her as a mother anymore, demands she offer her body if she believes she's done wrong. Filled with sorrow, Yuri complies, and in their long-awaited reunion, they find themselves rekindling their intimacy. From then on, their bond deepens into a forbidden relationship.