In the year 2050, engineer Derrida Yvain becomes aware of a bug in a new line of androids developed by his company. His attempts to avert disaster are blocked off at every turn, and soon, he and his friend Nathan are forced to run for their lives!

Derrida awakens from cryostasis ten years in the future, to find a world in ruins filled with rampaging androids. After being saved by a man named Vidaux, Derrida decides to fulfill his promise to Nathan by finding and protecting his daughter, Mage.

Derrida stops by Nathan's old house, where he runs into Mage's best friend Yuri, who is now a young woman. Yuri devastates Derrida by informing him that Mage is dead... but his grief is cut short when they're attacked by a woman in black.

To search for more clues about to Mage's whereabouts, Derrida and Vidaux infiltrate company building of Rebuild, the creator of the out-of-control androids. But to do so, they'll first need to navigate the underground tunnels and gain access to the city.

The group traces Mage's steps to a museum in the city of Vanfort. Derrida is struck by memories of visiting this place with his father when he was a child, and the strong memory spurs a sudden leap back to himself ten years before...

Damages to Graham from repeated battles have taken their toll. While Vidaux walks to the city for repairs, Derrida and Yuri spend the night in an abandoned home, where Derrida begins experimenting with the mysterious "time ride" phenomenon.