Guillermo S. Maldonado

Landru, a French businessman, arrives Mexico with the idea of ​​promoting their fighters, what nobody knows is that besides Landru promoter and fighter is a mad scientist who seeks to alter human genetics mixing it with the animal to make stronger and fiercer to their gladiators.

The inmates of an insane asylum take over the institution, imprison the doctors and staff, and then put into play their own ideas of how the place should be run.