.hack//Quantum - the latest installment in the phenomenally successful .hack// - dares fans to find out what's been happening in The World since their last visit. Tobias, Mary, and Sakuya are way into the The World. Together, they form an inseparable group, grinding until the break of day and running dungeons in search of the artifacts of adventure. But when the trio becomes lost in this virtual labyrinth, a chance encounter with the mysterious entity known only as Hermit will change their lives forever. There's an eerie darkness spreading across The World, and once you stumble in, you may never make it out.