Kuraki has taken his grandfather’s ancient sword to the Shinnagi festival for an ancient cleansing ritual, and finds himself inexplicably drawn to a beautiful shrine maiden. As night falls, the priestess is revealed to be Nanachi, the son of the guesthouse Kuraki is staying in. The bond between the two is strengthened as they discover they share the ability to see spirits and use the ancient Japanese magic of Izumo. However, on the night of Nanachi’s initiation as a shaman, Kuraki accidentally sees a ritual sacrifice that is an attempt to break the curse of Susanoo, and becomes the target of the newly instituted and blood-thirsty leader...
With a past shrouded in mystery and a blank memory, Shiki Tohno seems to be just another "average high school student". That is, until he nearly kills a female vampire with his secret deadly ability to "see the lines". His journey to unlock the secrets of the Tohno family and unbury his own lost memories has only just begun, and now he must also help the woman, Arcueid Brunestud, find a lethal phantom named Roa, and kill it using his ability.
With what could have been a normal slice-of-life type show, both Tsukihime and Eight Clouds revel in darkness, leading the viewer by the hand and along a very dark path. Filled with blood and gore, action is not the most important part of either show. Taking their time with slowly unfolding back story and building up the characters, the shows will appeal to viewers who like something to think about - as well as seeing plenty of troubled teens with a sudden urge for blood.