In the year 1963 in Yokohama, an innocent romance blossoms between two high school students, Umi and Shun. As Japan recovers from World War II and prepares to host the 1964 Olympics, the mood contains both optimism and conflict as the younger generation struggles to escape the shackles of the past. While trying to save a dilapidated Meiji-era club house from demolition, the relationship flourishes. But a buried secret from their past emerges to cast a shadow on the future and pull them apart.