To trace Soul Howl's trail to the Celestial Ruins, Mira must travel by transcontinental railroad. Although the three-story behemoth shocks her at first, she finds herself more and more excited to travel by train. During her journey, Mira watches the scenery speed by, enjoys station lunches, and relaxes in high-class hotels, meeting all sorts of people along the way. As Mira advertises for boutiques and mediates lovers' quarrels, a suspicious black-clad man creeps ever closer...