Daria Giraldi is a skilled poker player. Convicted of fraud and gambling, she must serve her sentence in social services. During a work shift at the airport she has a chance encounter, which strikes her. Closely followed by her brother Davide who is also her lawyer, Daria is marked closely by her supervisor, Major Napoli who recruits her into the Secret Services as an undercover agent to capture a dangerous exponent of an international criminal cartel. Ettore tests Daria to probe her cold blood and is amazed by her promptness and wit.
Still in shock from what happened at The Rome hotel, Daria insistently tries to meet Gemini again. He then manages to take his place in a match against Monti, his business partner, thus discovering fundamental information for the investigation. Ettore no longer wants Daria to risk his life and keeps her under strict control while their relationship becomes more and more intense. After accidentally meeting Gemini, Davide corners his sister to find out what role the man plays in his life. Daria is at a crossroads: will she tell him the whole truth?
While Monti's murder places Gemini at the center of the investigation, Daria faces Longardi's interrogation. Meanwhile, his interest in Ettore is veiled by the suspicion of being only a pawn of the Services. An evening at a chamber concert becomes the theater of revelation. After an escape and a clandestine journey, Daria and Gemini infiltrate a night club to steal a secret archive that could dismantle a criminal organization.
Longardi's revelations about Gemini's past put Daria in front of a deep dilemma, while Ettore involves her in an operation to dismantle the Cartel. An unforeseen event will portend new, dramatic developments. Although Gemini has led the double game for many years, Daria is forced to help him in his escape plan if he wants to save Ettore's life.
