An evil mastermind, known as La mano negra, attempts to steal a formula that creates synthetic drugs but a masked avenger known as La sombra will do anything to stop him. Armando Silvestre, Alicia Caro, Fernando Osés, Rodolfo Landa, Pedro de Aguillón, Mano Negra, Carlos Martínez Baena Added on Amazon Prime 2020-12-15.