Russian prostitutes are turning up dead (or very nearly dead) in Lapland, Finland. They seem to be infected with a deadly virus. The local cops team up with the Russian cops, but are quickly bumped off the case.
Interest in the virus stretches beyond just government departments. The doctor's wife shows up unexpectedly. One of the captive prostitutes makes a break for it.
The German research doctor is called on to deliver a baby. The escaped prostitute makes it to the hospital. The church is reluctant to cooperate in the blood testings. Little sister falls off the wagon.
Nina grapples with her own personal choice. Pharada gets ready for the launch event of their new car. When Nina finally discovers the secrets from the past, she has to race against the clock to stop a murder that has not yet taken place.
The cops and the health departments share information and form a fragile alliance - but the bodies keep piling up. The scale of the danger from the virus becomes apparent - and the Russians are coming.
The Russian girl starts talking to the Finnish police, but at what cost? The role of the Russian Mafia becomes clearer. The illicit romance gets stronger and more dangerous.
The secret of the murdered pharmacist leads Nina to investigate the international car testing in Ivalo. She encounters the American engineer Brendan she saved some years ago. Hamari is out of prison and stumbles upon the test car.
Patient Zero is apparently revealed. The virus mutates and is substantially more dangerous. The doctor's visitation with his daughter raises hackles. The policewoman's daughter takes a sharp turn for the worse.