A decade ago, a devastating virus swept across the globe. It transformed its victims into bloodthirsty monsters known as Dracules, with death being the only cure. Now, with humanity on the verge of extinction, only the elite warriors of the Vius Squad stand between chaos and civilization. New recruit Leila Mikami is one of the squad's most promising young fighters, but she harbors a personal agenda: her parents were killed by a Dracule, and she is determined to seek revenge. To achieve this, she must find the Dragon Eye - a magical weapon that will make her the most powerful warrior in the world.