A man is imprisoned for a crime he didn't commit, and is set free by the General of the police, who believes his innocence. The only condition of his release is that he must secretly help the police catch criminals. "Luis Roberto Guzmán es 'El Pantera, ' un hombre al que la vida lo lleva a convertirse en héroe vengador. Víctima de una terrible injusticia que le arrebató al amor de su vida, decide comenzar a trabajar como ayudante del muevo jefe...