The discovery of a human torso thrown into a waterway, leads the viewer to observe the work of modern criminology and the task of special agents to track and record the psychopath's mentality through the elucidation of techniques present in the reality of the police investigation.

• Marciano Martín
• Palmira Arzubide
• Alfredo Wally Barrón
• Richard B. Cain
• Queta Carrasco
• Mario Cid
• Marcela Daviland
• Felipe del Castillo