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.

Zé do Caixão hosts this anthology of three short horror stories which feature a strange dollmaker, a necrophiliac balloon seller with a foot fetish, and a psychotic professor involved in sadistic rituals.