Two men, one recently out of the army, walk a trail to a mountain. Uphill and downhill, cool breezes in the shadows of the trees, shouts from the mountaintop. They go hiking and share their regretful love stories.

Na-eun believes she is a cosmic being. She has been trying to communicate with space at noon in a park. Seok-min is an unemployed young man who has been looking for a job. He goes to the park to take revenge after his close friend was hospitalized because of injuries caused by Na-eun but falls for her when he sees her.