The Dark Horse is an emotionally-charged and inspiring drama about a man who searches for the courage to lead, despite his own adversities - finding purpose and hope in passing on his gift to the children in his community.

马君豪与小麦从少一起长大，小麦因误入歧途而给黑帮大哥龙天翔利用帮他走私贩毒，小麦母亲发觉他儿子吸毒而求马君豪助他从新做人。马君豪暗中劫走龙天翔交易的毒品而令这黑帮大哥非常愤怒，他手下捉了小麦要马君豪交还毒品。

　　20世纪初，北方活动着一支威震四方的响马。他们在首领黑龙的率领下，打家劫舍，杀富济贫。在一次抢劫中，他们遭到守备队的追击。突围前，黑龙将自己的儿子交给了师父李全义，要他乘乱逃走。 　　15年后。响马曹彪的儿子少彪惨遭日本人杀害，黑龙决心为弟兄报仇雪恨。在复仇归山的途中，黑龙的妻子金凤被抓，新任县警备队长李念祖亲自过问此…