Nightfall. Marco, a politician, is murdered while he is going home. Also Luca, a gay man, is going home, where his partner Paolo is waiting. But he is on the killer's way, and he is shot. Paolo dashes to the hospital but the doctor doesn't want to tell him anything because Paolo isn't a "real" relative. Luca dies. Paolo starts walking in the streets of the town, where his loneliness will be ever misunderstood. A barman tries to comfort him supposing he was discharged by his girlfriend. Luca's mother orders Paolo to leave the house. A guy takes Paolo to him's, looking for a partner in the night. Paolo runs away from everybody, also from his friend Francesca: she says she is understanding but she can't. While the dawn is coming, Paolo reads about the murders on the newspapers, and realizes that what happened was reality.

The aftermath of a rape seen through the parallel lives of the assailant and victim as they try to redeem and rebuild their lives respectively.

It depicts the relationship between an elderly woman and her caregiver.

The miniseries tells the eight double murders committed from 1968 to 1985, in the Florentine countryside, where young couples who were massacred appartavano in their cars looking for intimacy. It particularly emphasizes the personal battle of Renzo Rontini, father of Pia killed with her boyfriend Claudio Stefanacci in Vicchio, in Mugello (29 July 1984), in the search for the culprit of the death of his daughter.

Follow the case of "Il Mostro di Firenze," Italy's first serial killer, who eluded justice while terrorizing the nation for decades.