In an age of open racism, fervent nationalism and anti-establishment passion, two politically engaged and idealistic young lovers, Marcus Hill (Babou Ceesay) and Jas Mitra (Freida Pinto), fight back against the injustice and deep-rooted prejudice they face on a daily basis. Unknown to them, Marcus and Jas become a target of Special Branch's Black Power Desk, a unit dedicated to supressing black activism, led by police officer DCI Nicholas Pence (Rory Kinnear) and his deputy Cullen (Daniel Mays).