With a contagious sense of abandon, three young adults' lives become intimately entangled over the course of a long summer in Hakodate, Hokkaido.

The bittersweet events in the lives of people in Hakodate, a regional city connected by a streetcar network. A laid-off man and his younger sister go up a mountain to see the first sunrise of the year. Meanwhile, Haruo has inherited his family's gas business, but things aren't going well in his new endeavor and he becomes increasingly frustrated.