Viper is the nickname Leone, a blacksmith in a small Sicilian village, gave to his wife, who ran off with another man. The war ends: the fascists disguise themselves first as communists and then as Christian Democrats, and the poor survive by dancing and drinking. Leone's daughter Rosetta becomes pregnant; Leone dies, and the newborn (named Fortunato) is taken from his very young mother, who ends up in an institution. When Rosetta comes of age, she is reunited with her "witch" mother and her son.

Eight episodes vaguely inspired to real events. The "fil rouge" is the relationship between the Italians and sex in the first years of 2000s. From prostitution to virtual sex all the categories are represented in a funny way that anyway tries to investigate this kind of reality.