Yuki Cross' earliest memory is of snow and blood - she was attacked by a vampire only to be rescued by another. Ten years later and Yuki has been adopted by the headmaster of the prestigious Cross Academy. This school is unique in that it consists of 2 classes - a Day Class and a Night Class. The Night Class is made up of vampires led by Yuki's rescuer all those years ago, Kaname Kuran. Together with Zero Kiryu, a childhood friend who despises everything to do with vampires since his family was murdered, Yuki must serve as a Guardian of the school to keep the two classes separated. Secrets lie beneath a peaceful exterior and not everything is as it seems, as Yuki learns the truth about Kaname, Zero and her own forgotten past.