Never before has a case been as tricky as this: The newlywed husband of Carlina's cousin is found drunk and unconscious in the arms of a dead prostitute. He claims he has no idea how he got there, but even his wife doesn't believe him.Commissario Stefano Garini is forced to investigate this case, and though he believes Lucio has been framed, he can't find the evidence he needs. On the contrary, every new clue seems to provide proof that Lucio is the murderer. On top of that, Aunt Violetta and Uncle Teo have come up with a new business venture that keeps the Mantonis busier than ever: Guinea pig racing!