A widower's young son leads the police to a killer of sinners in Mexico City.
| Actor | Role |
|---|---|
 Ricardo MontalbanAntonio Gómez | Antonio Gómez |
 Anne BancroftMaría Ibinia | María Ibinia |
 Lee MarvinThe Killer | The Killer |
 José PérezPaco Gómez | Paco Gómez |
 Rodolfo AcostaLt. Fernando | Lt. Fernando |
 Carlos MúzquizCapt. Saldana | Capt. Saldana |
 Jorge TreviñoSergeant | Sergeant |
 José TorvayAndrés Martínez | Andrés Martínez |
| EEva CalvoCarla Arlota | Carla Arlota |
 Fanny SchillerCarmen Martínez | Carmen Martínez |
 Tamara GarinaDoña Lucrecia | Doña Lucrecia |
 Pascual García PeñaPorter (as Pascual G. Pena) | Porter (as Pascual G. Pena) |
 Tony CarbajalPedro (as Antonio Carbajal) | Pedro (as Antonio Carbajal) |