Revisions centers around Daisuke, a high schooler with a mysterious past abduction. He and his childhood friends find themselves suddenly transported over 300 years into the future during an event called "Shibuya Drift."
They discover a devastated Shibuya overrun with strange, giant mechanical monsters called "Revisions." A mysterious girl named Milo, bearing the same name as Daisuke's childhood rescuer, provides them with powerful mobile suits, the "String Puppets."
Milo tasks them with protecting Shibuya. Faced with overwhelming odds, fragmented paths, and cryptic prophecies, Daisuke and his friends must navigate this dangerous future, learn the truth behind their displacement, and strive to find a way back to their own time.