A bomb attack kills officers from a Border Guard unit deployed in the Bieszczady Mountains. Capt. Rebrow loses his friends and his beloved Ewa in the attack. He is determined to find out who is the mastermind behind the bombing.

DA Dobosz is heading the investigation into Boarder Guards station bombing. Rebrow accepts Major Markowski's offer and return to active service. Luczak, Rebrow's friend, suspects that the bombing was authored by the local mobster, Kalita.

Rebrow is haunted by the thought that Ewa is alive. A group of illegal immigrants is walking along the main human trafficking route. During the chase after one of the guides, Rebrow notices a mysterious shape on the forest clearing.

The case turns to be more complex than it appeared to be. DA Dobosz is interrogating Rebrow at the police station. Markowski is ordered to clear things up in his unit. Meanwhile, Natalia's body is discovered in Bieszczady.

During the search of Natalia's murder scene, Dobosz finds Rebrow's lighter. Later, in Kalita's hiding place she finds the gun which was used to shoot Kosowski and Ewa, and also a Rebrow's blood stained shirt. Kalita and Rebrow are arrested.

Natalia's funeral is staged in Warsaw. Rebrow asks for a meeting with DA Dobosz and confesses to killing Natalia. During the inspection at the crime scene, Rebrow flees. The police and Border Guard officers set off on a chase.