In a faraway town, forest ranger Chen Qiang escaped an "electric shock accident" because he changed shifts with his master Jin. In order to find out the truth about the death of the forest ranger Jin, Chen Qiang gradually approached the underworld gang headed by Lao Wu and Mrs. Ye. He also got acquainted with Liu Qiang, Zhang Qiang and others. With the gained friendship and love, he finally cooperated with the police to destroy the underworld team....