Professor Fernandez is studying the metamorphosis in living organisms to cure his daughter of a strange disease that occurs in full moon nights.

Kitty de Hoyos
as Clarisa Fernandez

Joaquín Cordero
as Dr. Alejandro Bernstein

Columba Domínguez
as Marcela de Fernandez

José Elías Moreno
as Professor Fernandez

Roberto Cañedo
as Dr. González

Noé Murayama
as Cazador de Lobos

Adriana Roel
as Alicia Fernandez

Crox Alvarado
as Crumba

Ramón Bugarini
as Inspector

Hortensia Santoveña
as Housemaid