Zen is actually a serious action/drama set in the 1750's in Japan. The story is about a young 15 year old samurai warrior, by the name of Zen. He lives with his Master Lord Ito and his beautiful young granddaughter Keiko, who is also 15. Zen sees Keiko as a sister, but she sees him as her future husband. This causes them a few problems. Together the two of them learn a lot about life's relationships, love, hate and Vampires.