Kino, a traveler who journeys the world with his talking motorcycle, Hermes, arrives in a country where people live inside massive domes. There, she meets a girl named Inertia, who asks him to deliver a letter to her pen pal—a boy who lives outside the dome.

Kino, a traveler who journeys the world with his talking motorcycle, Hermes, arrives in a country where people live inside massive domes. There, she meets a girl named Inertia, who asks him to deliver a letter to her pen pal—a boy who lives outside the dome.