Las puertas del cielo permanecen selladas mientras el infierno se ahoga en diluvios, dejando que los mundos paralelos se desvanezcan. Ángeles, demonios y humanos confluyen en el purgatorio flotante de Tokyo Babel, su última esperanza de redención. Inician una peregrinación a través de sus siete capas, con el objetivo de escalar la Escalera de Jacob y restablecer el acceso a los cielos.
Un joven llamado Tendou Setsuna, rechazado desde su nacimiento, sobrevive a su mundo en ruinas y se une a Lilith, la Bruja de la Noche, en este camino. Peregrinos enloquecidos amenazan con sembrar el caos en las capas, convirtiendo la expiación en conflicto. Los jugadores guían la aventura de Setsuna, en busca de la razón detrás de su inquebrantable voluntad de vivir.
The gates of Heaven are closed shut; the realm of Hell consumed by flood.
And in their wake, countless parallel worlds wither away, one after the other.
The surviving angels and demons gather at the city they believe to be their final chance at salvation: the floating purgatory of "Tokyo Babel".
Joined by humans, they embark on a pilgrimage across the seven layers of Babel, hoping to ascend Jacob's Ladder in an effort to re-open the gates of Heaven.
Their journey would be an atonement toward the heavens.
And yet, their plans fall into ruin as a group of pilgrims - their minds consumed by madness - set out to lord over the numerous layers of Tokyo Babel with the intention to wreak complete and utter havoc atop the floating purgatory.
Amidst this neverending impasse, a lone youth is saved from the ruins of his devastated world - Tendou Setsuna, a man denied human treatment since birth.
Joining his savior, Lilith - known as the Witch of the Night, he begins his journey across Tokyo Babel...
...yearning for an answer to a single question:
Why he still possesses the will to keep on living.
