Who is the perpetrator , plotting to start a war between the world of people and the Dark Territory? The heroes of Underworld Kirito and Asuna bring the enemy to clean water! Mountain Goblin Myala is suspected of killing the cleaner Yazen , but it just couldn't happen in Underworld , The people who are bound by the Code of Prohibitions and the right of the strong .. Trying to figure out what happened, Kirito turned to the commander-in-chief of the army of darkness Iskan, but the alleged criminal, a mysterious man in a black cape, left under their noses. When the investigation comes to a standstill, Asuna comes to the inn where the murder occurred, and the spell of a look into the past shows her incredible things... Meanwhile, over the knights-students of Ronier and Tizet clouds thicken! The end of the cycle "Moon Cradle"!