In the Carpathian region and in Kyiv, foreigners are killed simultaneously. These events provoke a strong reaction from embassies and consulates, which insist on the urgent intervention of the best forces.

The task of solving these crimes falls to the detectives of the OCA and the Water Police, who have recently merged to form the C.O.D. team, which has experience in investigations on both land and water.

Lieutenant Colonel Serhii Polianskyi is called to the Ministry of Internal Affairs, and he is sure that he will be alone at this meeting. However, he finds himself in the company of Margot and Olha Kosach. Margo informs the heads of Ukraine's two best investigative bureaus that they will now work together.

The Special Investigation Agency and the Water Police have to join forces to find the killers of foreigners and prevent an international scandal.