Animas Trujano is a colorful but irresponsible Indian in a small Mexican village. He hopes above all things someday to be chosen mayordomio of his village, a place of great honor usually ...
Reynaldo and Martín Del Hierro are witnesses of the murder of their father by Pascual Velazco, as they grow up they're poisoned by the desire of vengeance by their mother, but once they get it it'll change their lifes forever.
Professor Fernandez is studying the metamorphosis in living organisms to cure his daughter of a strange disease that occurs in full moon nights.
Nace el hijo de Lázaro y crece con todo el cariño de las gentes que lo rodean. Por celos y odios Lázaro sufre una tremenda pérdida. El dolor lo vuelve paciente y astuto y se dedica a vengar la muerte de su hijo y de su esposa.