Duran and his team of the fifth group are secret agents missioned by Inspector Peña to find and capture a gang of dangerous criminals who are planning a major hit.

• IFI Film
• Armando Moreno
• Manuel Gas
• Miguel Fleta
• José María Marcos
• Carolina Jiménez
• José «Saza» Sazatornil
• Barta Barri
• Arsenio Freignac