Wife Shino is 41 years old and has been married for five years. They have no children, and since she works during the day, her time at home is limited. What she values most is a relationship with someone with whom she can honestly express her feelings. She truly believed that marrying him would lead to a happy family life. But five years have passed with no children, their conversations have dwindled, and sex has become infrequent. Imagining her life twenty years from now, Shino feels deep anxiety well up inside. If nothing changes, their marriage might be over. Driven by this fear, she decides to embark on a trip with a complete stranger—hoping that something, anything, will change.