Following his wife Lidia's death, the former "Folgore" Marco Tancredi goes in search for her killer, discovering very soon that Lidia was part of the Italian Secret Service, inside which she had probably found out an hidden conspiracy.
Marco's investigation to solve Lidia's death leads him in Budapest then back in Italy, where together with the squad follows traces of Oksana, a Russian policewoman in search for vengeance for her daughter, killed in a Chechen attack.
Marco and his squad cooperate with the CIA to stop a group of terrorists from execute a dramatic BW attack against Rome using a deadly virus. Furthermore Marco finally finds traces that could bring him to his wife's murderer.
While Marco infiltrates into a military prison to recover a load of stolen weapons, Carrisi follows Giada to solve the mystery behind her betrayal, finding out that the conspirators have taken her brother hostage.
Branded as traitors, Marco, Giada and Carrisi have no choice but keep following Lidia's traces in search of the conspiracy's leaders, in order to prove their innocence and protect their Country from the true traitors.
The ultimate showdown is coming. From Yemen to Rome, it's time for Marco to solve the mystery behind her wife's murder and prevent the most devastating terrorist attack in history from taking place.
