A killer with the cunning of a maniac. A little boy with the courage of a lion.

A widower's young son leads the police to a killer of sinners in Mexico City.

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Main Cast: Ricardo Montalban, Anne Bancroft, Lee Marvin, José Pérez, Rodolfo Acosta, Carlos Múzquiz, Jorge Treviño, José Torvay, Eva Calvo, Fanny Schiller

Directors: Harry Horner, Rafael Portillo

Writers: Robert Presnell Jr., Leo Townsend

Editors: George Crone, George A. Gittens

Cinematographer:

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