By the end of the 19th century, the last seven vampire clans spread across Europe. They are extremely hostile to each other, but as Modern Times threaten their species with extinction, there is only one way to ensure survival. Their children, the "Heirs of the Night", must be trained together to benefit from the strengths of other clans. A child vampire with a human heart is chosen to unite all beings. Alisa finds it difficult to cope with this enormous responsibility ...