After a personal tragedy, Polish intelligence agent Ewa Oginiec plans to quit the service. Her world is shaken when her partner vanishes following exposure by Russian operatives.

The series follows Ewa Oginiec (Góra), who wants to leave the secret service and start over after a personal tragedy. Things take a turn when her partner, also an agent, is exposed by Russian intelligence and mysteriously disappears. The Eastern Gate examines the mechanism of provocation on the world stage and the battle between intelligence services in a world gripped by the complexity of hybrid warfare.