After a 17-year-old girl is found dead in a canal, a public prosecutor makes a shocking discovery about her that puts a planned leave from work on hold.

The trial begins: Elena presents party photos, a dress tear and a witness with sharp hearing to build a murder scenario. Linda's alibi is questioned.

Linda's father orders Ruggero to cross a line. Andreoli testifies he found DNA evidence in Palazzo Te's garden. Ruggero pursues the catering van lead.

Using cellphone records, Elena identifies the man on the scooter. A detail Arrigoni mentioned about Nicola Tomei leads Ruggero to a shocking discovery.