Beheading demon family

Eighty years ago, some sleeping ancient creatures suddenly woke up. Later, these creatures were called "demons" or "monsters" by later people... Cai Yu, as the second young master of the Cai family, a traditional demon cutting family that has guarded Xishan City for generations, blamed the whole family for the death of his parents when they performed the demon cutting task... which is better than the high-tech force armed to the teeth reconnaissance and anti reconnaissance; Hunters and prey the reversal of the situation is only between breathing