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.

Martino is settling in Peppino's grandfather's house, trying to make it inhabitable. Peppino does something he thinks is essential for the cause, but Martino is devastated and tells him to leave.

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.

Peppino and Martino visit the old house of Peppino's late grandfather. The house is falling apart, but Martino thinks it's perfect for his plan. Peppino wonders if Martino is on drugs...

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.

Martino goes to Peppino's house to tell him his great idea. Peppino is kind of busy, though... The local priest spies Martino walking home and engages him in conversation, which is the last thing Martino wants.

Marta meets the victim's family at the bus stop. Fabrizio compliments Marta on her work. Luca is hanging out with Sardi and baby Alice.

Martino goes back home and finds his mother in tears in front of the TV. He thinks it's about him. He goes to see Peppino and wakes him up to tell him about an idea he has had. Peppino is not alone.

Now that Manara is off duty, someone has to take over, and there's an awkward moment at the crime scene. Manara finds himself going to the market with Ada; after all, he has nothing better to do.

Martino and Peppino go to the Kursal, and as we could expect, finding Laura doesn't turn out so well. Martino has some hard thinking to do.

Luca Manara has been suspended, so he is acting as if he were on vacation, and as if he didn't care about the new crime that has been reported.

Martino finally goes home to his mother, and discovers that she watches the show Uomini e Donne (Men and Women) like everyone else, so she knows who Samantha is. Martino calls Laura, or tries to.

Manara succeeds in solving the case. But Raimondi is not happy at all and calls Manara into his office.

At the bar, Martino sees some old townsmen who tease him and tell him he should get a real job. One of the old guys mentions Fred Bongusto, an Italian singer known for a song "A Rotunda on the Sea". Martino and Peppino go off in a three-wheeled Ape (bee), a light commercial vehicle common all over Italy. Peppino cites Roberto Bolle, a famous Italian dancer, and Men and Women, a TV show for dating.

Manara has the proof he needs and goes looking for Pietralonga. An unusual chase scene ensues.