Ancient Beast is a tale of Derth the Dragon of Darkness whose plans are to annihilate the human race. Because he believes human life are parasite to the world. A Brave Knight by the name of Kane Brawler was out on an escorting mission for the King of the Flame Kingdom and was ambushed by another land. Kane was defeated along with his team However, Kane's rage summoned Derth the Dark Dragon and killed his enemies. Derth granted him power but at a price for his firstborn child to be his vessel. One year passed since then and Kane and his wife Julia were expecting a child. Within the 8th month of her pregnancy, Kane was sent out on another mission. While he was away, Julia was possessed by Derth the Dark Dragon while she was asleep. Due to Kane's promise to Derth. She killed everyone in the Flame Kingdom, in cold blood while they were sleeping and the children were fed to the demons. By morning everything was burned to the ground. Once Kane returned seeing the Flame Kingdom engulfed in flames. He and his second-in-command set out to look for Julia. On their travels, they visited a powerful sorcerer, by the name of Azura Winbald. He resided on M. Hikari, apon their visit a beautiful priestess by the name of Luna of the night company them to stop Derth. They traveled 3 weeks in search of the other Ancient Beast to seek help from them to stop Derth's plans. Two days before the full lune eclipse Kane and his new partners battle countless demons to get to Julia before Kane's child is born. On the night of the full Luna eclipse, Julia's water broke and rays from the full Luna eclipse opened a huge dark portal in the middle of the night sky. Shining on Julia lifting her in the night sky, in the center of the huge portal. The battle raged on for hours but due to the 4 brave Heros, and 4 of the Ancient Beasts Ryuuji (Fire Dragon), Mano (Water Shark), Dunia (Rock Lion), and Nilch'i (Wind Eagle). They Had helped Azura seal away all 5 Beasts inside of a Book, calling it The Book of The Beast. The book was sealed away in a large oak tree in the middle of the Demon forest, south of Mount. Hikari. Unfortunately, Juila's body was sealed away in the book However, her soul was placed in the child.