Head of Department Q, the elite unit of the Polish secret service, Konrad Wolski organises an ambush in Istanbul to try to put a big Belarusian arms dealer out of harm's way.
During the arrest of a Belarusian arms dealer in Istanbul, Konrad Wolski, head of the Q department, discovers a plan for a terrorist attack in Sweden with weapons from a secret Soviet arsenal in Belarus.
After Stepanovitch's death, Polish intelligence is convinced that the attack is linked to Travis' mission. Department Q is trying to figure out who blackmailed the Prime Minister.
While Nadia suspects Travis of taking bribes, the latter confesses to her that he is a mole in the KGB and that he works for the Polish secret service. Unfortunately, his fiancée gets kidnapped a few hours later.
Konrad persuades Klimovich to sell the Prime Minister's briefcase, then it turns out that someone else is behind the cause, Yurevich; Marcin watches the Russian agent Hans in Sweden.
Konrad Wolski, the head of the elite Polish intelligence unit, learns about a terrorist attack planned in Sweden, and the weapons to be used in the attack are to come from the Soviet arsenal hidden in Belarus.
Muhamedov kidnaps Marcin and Nasim; the SAP0 and Q Division are trying to locate his hiding place to rescue their two agents; Jagan helps Hans break Abdul out of the hospital, but demands a quid pro quo.
Marcin tells Konrad that Muhamedov is not Safir; Konrad must return to Poland as he is being framed for an information leak about Travis; financial control is ordered in Department Q; Hans is deceived by Jagan, and he plans his revenge.
Hans shows Konrad the photos of the anthrax he discovered in Sweden and offers to help his son avoid a terrorist attack; Lutek questions Kuba's testimony and accuses him half-heartedly of having killed Aslan.
Konrad wants to do everything to identify the mole who tried to discredit him. He decides to join forces with his father to thwart the attack in Stockholm before the latter is exfiltrated by the Russians.
