《完美生物》设想了一个人类和吸血鬼和平共存的世界，当一场流行性传染病开始席卷人类后，一名吸血鬼埃德加转而袭击人类，这种微妙的平衡看似要被打破，教会派出西鲁斯去抓捕这名吸血鬼里的叛徒。西鲁斯同一名人类警官伯罗斯一起将要找到躲藏在黑暗地下的埃德加。 The "perfect" biological vision of a peaceful coexistence between humans and vampires in the world, when an epidemic began sweeping the human, a vampire Edgar to attack humans, this delicate balance seems to be broken, the church sent to arrest the man in a vampire. Xilusitong a human officer Bolos together to find Edgar hiding in the dark underground.