During the Edo period, an incident occurred in a certain castle town where young samurai were weakened and died one after another. Suspicious, the chief retainer investigates and discovers that a beautiful princess named Tsukihime is giving her body to the young samurai every night and spreading her own disease. The chief retainer trapped Tsukihime in a pot with the help of a monk who used his magic powers and sank her into a pond, but when a female ninja servant came to rescue the princess, a h...