The aging Kotaro Konomi is consumed by an ever-deepening desire that swirls within his chest. Believing it to be proof of his existence, he still hides it away, ashamed of his age. The object of his longing is Misako, his son's wife, who lives with them. Before long, the two become increasingly entangled in their mutual feelings. But suddenly, their son Minoru falls gravely ill and is forced into bed rest. Along with this tragedy comes a financial crisis threatening to destroy the family. What choice will Misako make?