The Year is 2121. Over a century had passing since the apocalyptic event known as the "Great Transition". The world has now become overseen by the Spirits of Classical Masters from the past. On the present day, three stories take place. One following the orphaned children of a Renowned Man who was shot in a duel. The other following a 12 year old boy who is a religious extremist who travels to dangerous tasks. The final being about a group of young soldiers lead by a mute captain. All three would be interlinked as they will soon uncover the mystery of "1 + 1 = U".