Mistrust is rife in the Twilight Brigade: everything seems to point to Haseo, the unlucky victim of circumstances. But a mysterious object has appeared: the Virus Core. Haseo and Shino discover a strange place in the Lost GRound which holds the key to the meaning behind the Virus Core... all 6 of them, could they be a clue to the Key of Twilight? With that suspicion for the hunt for the Virus Core begins, but the Twilight Brigade isn't the only guild hunting for the objects... This could prove to be a perfect time for a trap to be sprung by Naobi, from the TaN guild.