Luca is saved thanks to the bulletproof vest he was wearing. Giulia tells him that their investigation also leads to Paolo's true killer, while it turns out that Remo is still alive. The 10th Tuscolano will no longer be closed, and meanwhile, the third new recruit, Pietro, arrives, who, along with Gabriele and Marta, investigates the murder of a car dealership owner. A trap for the men of the X, who find themselves in the middle of a sea of ​​bullets. Giulia Corsi forced to deal with the death of Luisa Baccarini, her only possible witness. The case of a missing child and a man, Remo Damiani, who reappears before Viola's eyes, forcing her to make a heartbreaking choice.