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.

Fernando Almada is 'El Griego' a world famous ventriloquist now on the brink of madness. Because he can no longer find an audience for his show, his strange personality makes him abuse the puppets he works with. But they seem to have a life of their own. Now Fernando is swep into a world of terror as the puppets seek their revenge!

A scientist experimenting with past lives finds a reincarnated Aztec who can lead him to lost treasure—and to a creature that should remain lost. (Composed of footage from two unrelated Mexican horror films, LA CASA DEL TERROR and LA MOMIA AZTECA, plus new American-made footage.)

Tourists visiting the pyramids in Mexico experience a string of deaths and disappearances while staying at a nearby hotel. Police investigators Fernando and Cornado are assigned to the case and attempt to solve the mystery with the help of reporter (and girlfriend of Fernando) Veronica and the wrestler Santo.