On a day that starts like any other, a boy's life is changed forever. As the main character and his friend Miki pass a leisurely afternoon, Miki suddenly collapses from an unknown illness. When the girl shows no sign of waking, the main character grows distraught over not being a better friend and not having the means to save her.

Suddenly, a strange voice offers him a second chance: “Beyond the door you can change your destiny!” He soon leaves the real world and journeys to the world of Vision, where, as a novice “Traveler,” he will surmount myriad ordeals in hopes of ultimately meeting with the Goddess of Fortune to have a single wish granted.