Aria Adelardi and Mai Adelardi were once a happy family. They had their loving parents with them and the family was known as the Adelardis, a royal vampire family. Until a tragic event happened, Mai and Aria never expected to see their parents to die and be the last of their bloodline to survive. Alone and sadden with the loss of their parents, the sisters continued on with their lives. However, the worst didn't stop there because there was someone after them but the girls don't know this unknown killer. Now, they're on the run to escape this murderer and with the help of their long lost friends, can they defeat this figure? And when they meet their mates, what will happen then?