A married woman's two-day, one-night hot spring trip with a man during a stormy autumn downpour. At an inn where fate brings them together, they warm their shivering bodies and gradually deepen their emotional connection. Her married life has grown dull—unable to conceive a child, communication with her husband dwindling each day. Amid this emptiness, her words strike a deep chord: "I just want to talk about anything, really—don't you feel better after talking things out? We're husband and wife, after all." On a night of record-breaking rain in Izu, she suddenly opens up, pouring out her heart. A special day unfolds where warm waters and heartfelt intimacy intertwine.