The Medici are the most powerful family in Renaissance Florence. They dominate politics and economics. The long-established Pazzi family wants to break the influence of the Medici and is planning an assassination attempt on the two Medici brothers, Giuliano and Lorenzo. During Easter mass in 1478, Francesco de' Pazzi and a group of men attacked the unsuspecting brothers. Giuliano dies immediately under Francesco's angry knife stabs.
The brutality of the crime can still be seen today in the victim's bones. But Lorenzo can escape. The coup in Florence fails. The perpetrators are quickly caught and the search for those behind the conspiracy begins. Florence Kasumba, together with historians such as Marcello Simonetta, collects information from medicine, psychology and art history.