On a rainy day in Rome, a mysterious vapor seeps from manholes, causing those who inhale it to confront their suppressed desires and rage. The Morel family is unaware of the impending revelation of their darkest impulses.

In the past few days Rome has been the scene of a singular event: when it rains, the manholes exhale a dense steam whose origin and composition is unknown. No one can imagine that whoever breathes in the mysterious substance will have to deal with what he/she represses, their darkest instincts, their anger. Not even the Morel family.—Propaganda Italia