Ryuga and Rian are in a graveyard following rumors about a cursed grave keeper known as Hyena who they learn is a Mad? Horror. As Ryuga prepares himself to kill him after Rian restores the Mad? Horror's speech, Hyena begs for his life as he claims that there is a way to restore his humanity while acting lustful over Rian. After Rian leaves on Ryuga's call, Hyena reveals his true personality as he tells the Makai Knight how he was originally a psychologist stationed where the SG1 is now located. But his life took a plunge when his partner, a client of his, turned him into a monster and forced him into the graveyard after stripping him of his voice. By the time he finished his story, Hyena reveals he knew that Rian left behind a charm to overhear their conversation while she, Takeru, and Aguri check his story out. Annoyed, especially with the acid milk he was almost tricked by Hyena into drinking, Ryuga demanded if the client is Kaneshiro. But Hyena instead tells Ryuga the legend of the Horror Zedom, the creator of the first Mad? Horrors who was torn apart long ago by the Makai Knights with his parts hidden in separate places around the world. Hyena also reveals that Zedom's head is buried somewhere in Vol City and the song that is played by the goddess statues is actually Zedom's requiem he claims it to have been sung by an opera singer named Sophia who mysteriously disappeared. Following Hyena's instructions to uncover the truth behind Vol City, Takeru and Aguri break into the house of Maki, a violinist who was the last person Sophia was with. Finding a violin bow there, the two Makai Knights learn that Sophia was killed by Maki who is revealed to be a Horror. Despite doubting Hyena's intentions, with Ryuga holding him at sword point, Takeru and Aguri take the bow to marshland ruins where they find themselves in an ambush. By that time, Hyena takes a moment of distraction to restrain Ryuga, revealing that he has been lying about a means to restore Mad? Horrors to humans. Ryuga then manages to trick Hyena into cutting himself with his sword, using the shock wave to break free and slay the Mad? Horror. Later, with Hyena revealed to be Kaneshiro's son, Rian confirms the legitimacy of the Zedom legend while confronting Burai about him knowing something about the statues' song.