The investigation gets going. Luca, officially still off duty, had just come to meet his sister at the bus, but naturally, he can't help getting involved in the case, which causes a bit of confusion on the team. Rosmini comes to examine the victim.

Marta confides in Ginevra about Luca's declaration of love. Meanwhile, a bus arrives in town, and, as the passengers are getting off, there's a problem. At the same time, Luca is giving Ada a hard time as she drives him to the bus stop to meet his sister.

Luca has resolved the case, and Marta arrives with Fabrizio to take over from him. But who could have predicted what happened next?

Barbagallo and Buttafuoco find the DVD at the dump, but it doesn't show the clear evidence they were hoping for. Manara is working in the shadows, however, and comes up with something. He calls on Marta for help.

Manara may have been suspended, but that's not keeping him from working on the case in his way. Buttafuoco and Barbagallo go to the dump to find the DVD.

Luca gathers some more information about the case when he goes to see Laura's mother. Toscani and Marta go to the place where the DVD was thrown away.

The questioning continues at the station house. Manara's co-workers are keeping him up to date, in person. But they get an unexpected visit.

Marta and Ginevra talk about the toxicological report, but also about personal things. Luca and Lara say goodbye to each other, and Luca connects with Stefani's daughter by chance, giving him another opportunity to participate in the investigation.

Luca goes to see Sardi and Toscani. He opens the door and sees a familiar face he hasn't seen in a while. They go out for some seafood together.

Manara sneaks up on the winery owner's daughter and the stockroom guy. Toscani and Sardi ask Manara to run an errand, claiming they have 41° C fevers [105.8° F] as a ruse to get him to come over.

Marta has conversations with both Manara and Raimondi, neither of which is she too happy about. The term innominato or unnamed makes reference to the evil character in Alessandro Manzoni's novel, I Promessi Sposi (The Betrothed).

The squad interrogates Pupi, the murder victim's coworker at the winery. Luca gets to listen in on the interrogation and the ensuing discussions via Toscani's cellphone.

Rivera and Raimondi go looking for Mister Binacci, the victim's friend, with whom he had bought the boat. Manara is there, lurking, and Marta avoids him being seen by Raimondi. Meanwhile, Toscani and Sardi obviously have a secret and don't agree about whether to tell Luca about it.

Manara can't sit still, and goes to see Ginevra after hours, casting a "casual" glance on the murder victim. Marta and Toscani show the security camera DVDs to Raimondi. Manara goes to the pier to get information from a guy he knows there.

Toscani and the team go to see Manara in order to fill him in on the case and try to convince him to give them a hand. They are a long way from solving the case and use the wonderful, common expression in alto mare (at sea, on the high seas) to say this. We also learn something new about Marta Rivera.