Film based on the life of Dr. Salvador Mazza, who, with a group of professionals, conducts an investigation to discover the antidote to a mysterious illness whose carrier is a nocturnal insect. A Mazza was regarded as the first doctor who fought the deadly Chagas disease in Argentina.

Harry Havilio
Zavalía
José Luis Alfonzo
Dr. Kuhn

Miguel Ángel Solá
Salvador Mazza
Maria Lorenzutti
Beatriz
María Dorila Lanz
Mujer de la cooperadora
María Francisca Álvarez
Mujer de la cooperadora
Marta Gimeno
Mujer de la cooperadora

Mario Machado
Cadaver
Humberto Serrano
Arce

Pastora Vega
Clor

Carolina Fal
Elsa Conrad
Alfa Bidondo
Médico Mepra
Carlos Campos
Médico Mepra
Alex Benn
Hoover Miller

Suna Rocha
Madre de Luisa