Deep mountain heavy snow seals the forest. Young forest ranger Chen Xiangyang guards the mountain and fulfills his duty, accidentally running into a tragic hunter robbery-murder case. Ruthless and vicious poaching outlaws break into the old forest, disrupting the peace of the mountains. He unites with legendary old hunter Master Hei, leads the divine dog Kangyun, and coordinates with forestry police to launch an action. Relying on extraordinary courage and exquisite hunting skills, he hard-core chases murderers in the flying snow, engages in desperate combat, and wits against ferocious bandits, vowing to bring the scoundrels to justice and safeguard the order and justice of the mountains with blood and iron.