DC Anna Travis (Kelly Reilly) is back, reunited with the inimitable DCI James Langton (Ciarán Hinds), to face her most challenging and terrifying case yet. When the body of a young woman is discovered, sadistically mutilated and drained of blood, it would seem an ominous re-enactment of the infamously unsolved murder from 1940s Los Angeles, dubbed the ‘Black Dahlia’.