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.
When Nico returns from overseas to say farewell to his ailing mother, he discovers something monstrous is happening in the small town he once called home. As the list of grizzly murder victims begins to grow and the authorities fear the killer is a beast unlike anything they have ever seen, Nico senses a savage transformation within himself and uncovers the terrifying secret his family could never reveal.
