The Sengoku period of Japan: A time of near-constant civil war. Sonja, daughter of a slain samurai, is eager to prove herself worthy of her family's glorious history. But in a desperate moment, Sonja will make an awful deal with a dreaded sea goddess: She will be gifted magical armor and weapons capable of slaying mythical beasts! But if she falls in battle, her bloodline will be erased, her family's name no more.