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!

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.

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.