The hunt for the serial killer culminates in a shocking finale.

The murder suspect escape and shocking news comes from Russia, just when it seems the case is being solved.

The investigation leads Yehuda, Andrei and Masha to a place where the serial killer could be hiding. They reveal that it is a secret location and very sensitive to the Israeli authorities.

The investigation takes a new turn when Andrei obtains secret information from Leningrad. Russian authorities discover Andrei's investigation in Israel.

Yehuda is looking for Andrei, who he suspects is connected to the attempted assassination of Masha. Meanwhile, Andrei discovers what all the murders have in common.

Yehuda tries to decipher the connection between Masha Kogan, whose details were found at the scene, and the murder of immigrant. Andrei claims that Masha is cooperating with the killer, and Yehuda investigates this direction.

The station commander forbids Yehuda to cooperate with Andrei. Yehuda follows a drug addict, who uses the same drug that was injected into the murdered woman in Jerusalem, and at the same time Andrei starts an independent investigation in a foreign land.

1991. A new immigrant is murdered in Jerusalem. The killer engraved the number 37 on her forehead. Suspicion falls on Nikolai, the murdered woman's husband. Yehuda Jersey, the detective in charge of the case, doubts Nikolai's guilt and discovers that similar murders have happened in the USSR.