The Border tells the story of border guards in the remote region of Bieszczady, a mysterious and magical region where people can behave strangely. The first episode opens with a fatal bomb attack, killing guards who are stationed on the border with Ukraine. The only survivor, Captain Rebrow, loses friends in the attack.

Utterly confused, he tries find out who is behind the bombing. His commanding officer is determined to uncover the truth, working with an investigator from the national prosecutor s office.