In 1973, deep in the Qinling Mountains.
The five forest guards are responsible for guarding the forest and preventing poaching. But they didn't expect that the most ferocious thing was not the South China tiger or the mysterious shadow in the fog, but the desperate people and the heroes crushed by the times. Veterans turn into gangsters, heroes turn into evil spirits, brothers fight to the death, and comrades kill each other. Deep in the mountains and forests, there is a bloody past that dare not be told.
Some people guard the mountain, some keep their righteousness, and some just want to live.
