In the world of sword of magic, expert miners discovered an underground labyrinth in a remote area of the continent. “The Abyss” is very huge inside, full of monsters and traps. However, it was rumoured that ancient treasures lie deep inside its depths and adventurers from all over came to challenge the dungeon. Among them is the young and foolish samurai Shouran, and his party consisting of the sexy but problematic alchemist Nicolite, the aggressive M ninja Hakumeimaru and the expressionless mysterious archer Kurozuka.