Amidst a snowfall, a father and daughter, a young couple, and two coworkers must learn to work through their intermingled feelings as they come together for the town's light show on the riverside.
For Yui's 20th birthday, she and her mother pay a visit to the old observatory they used to go to every year in her youth. As they approach the snowy summit, Yui recalls memories of visiting the spot with her late father.
A boy and girl fall in love but are forced to break up when the girl decides to move to France to study. Heartbroken, the boy chases after her as she drives away in the snowstorm.