Crippled in battle, Li Tiangou is arranged to work as a guard in remote state-owned forest. In the village where the forest lays, there are three brothers, high-status and rich, who have logged illegally for a long time from the forest. As soon as Tiangou arrives at the village, the three brothers begin their plan to seduce him into their group. But at the first sight of what they have done to the forest, Tiangou is so astonished and angry that he makes up his mind to fight against them at all costs. Therefore, the three brothers use every means to take revenge on Tiangou. They cut off the electricity and stop the water supply of Tiangou¡'s house, humiliate his wife and abduct his son. However, Tiangou firmly sticks to his belief. Without any compromise, he guards the forest with an old gun and crippled leg.