Set in 1970s London, Guerrilla is a political thriller that follows a couple whose relationship and values are tested when they liberate a political prisoner and form a radical underground cell. Their mission is to take on the British government's secret counter-intelligence unit, the Black Power Desk, which is dedicated to crushing all black activist groups. As the couple navigates the dangerous landscape of political activism and state surveillance, they are forced to make impossible choices that threaten to tear them apart. The series explores the complexities of fighting for justice, the moral ambiguity of radicalism, and the personal cost of challenging an oppressive system.