Talpa (Arago), the demon lord of the Netherworld, is bent on conquering the mortal world. Standing against Talpa and his four Dark Warlords (Mashou) are the five Ronin Warriors, each in possession of mystical armor and weapons. They are assisted by Mia Koji (Nasty Yagyu), a young student-teacher, and a mysterious warrior-monk known only as The Ancient (Kaosu).