Maxine Peake and Rupert Penry-Jones star in Peter Moffat's thrilling legal drama following the rivalry, tension and intrigue between top barristers on the front line of criminal law. Martha Costello is a brilliant, passionate defence barrister with a reputation for defending the poor and downtrodden. Clive Reader is Martha's equal and opposite, determined, charming and ruthless in his pursuit to get to the top, he is also Martha's closest confidante. The two must find a way to keep the personal and the professional separate or everyone at their chambers will suffer.