In 1970s Northern Ireland, a young member of the Provisional Irish Republican Army is forced to navigate his dark past and forbidden love for a Catholic woman whose husband was killed by the IRA one year earlier. As Cal struggles with guilt and loyalty, he finds himself caught between his desire to leave the IRA and his growing feelings for Marcella, the widow of his former boss's victim. The line between right and wrong is blurred in this gripping drama that explores the complexities of war, family, and love.