The game is played from the perspective of two separate characters: Arata Mizunashi and Shina Ninomiya.[3] Both characters had worked together as video game programmers a year prior on a virtual reality MMORPG called "World Odyssey," until development was halted due to Shina's unexplained disappearance. A year later, Arata stumbles upon the game and is shocked to discover that the game's servers are still up and running, and that Shina is trapped inside the game with partial amnesia. The two learn that Shina is trapped in the virtual reality game until she finishes it herself, a matter further complicated by the fact that the game was unfinished and had apparently been hacked and altered by a third party.