Gu Shuangchen never imagined that a drunken act of heroism would land him in prison, much less that his time behind bars would happen to change the course of his life. An ancient and mysterious family of demon hunters, evil and merciless monsters, lifelong brothers, a rich heiress, a noble female vampire, a half-blood wolf girl, and a cool, aloof policewoman all enter his life. Where will he go from here? Will he give everything up and return to an ordinary life? Or will he shoulder the responsibility of a demon hunter, fight evil, master his powers, and become the strongest demon hunter?