Kite's friend Orca invites him to play The World. In the first dungeon they visit, they encounter a girl in white, Aura, being chased by a humanoid monster. Aura tries to entrust Orca with an item called "the Book of Twilight", but the monster attacks him, crashing The World's servers.
.hack//Quarantine sees the current server becoming increasingly unstable. To fix the problem, Helba replaces it with a copy of the Net Slum. At the bottom of a dungeon, Kite encounters Mia, a member of his party. He discovers that Mia is actually another Cursed Wave monster named Macha, whom he reluctantly defeats.
