Zealot is training with monks in feudal Japan when she learns that her sister has been captured by the dreaded Masked Warlord; She rides off to the rescue only to find that her foe is actually Prometheus and she has a difficult time getting her sister away from him.

In feudal , Zealot seeks training in not only sword fighting, but mental calmness. When a mysterious masked warlord kidnaps her sister Savant, that calmness is broken. Zealot must decide to break a promise or become a slave.