Maxine Peake and Rupert Penry-Jones return in Peter Moffat's legal drama about the lives, loves and hard cases facing a group of top end barristers. Defense barrister Martha Costello is now a QC of a year's standing and she's busier than ever. Meanwhile Clive Reader, now also a QC, is specializing in prosecution. The criminal bar is a small world and increasingly these two are pitted against each other in court. Can they keep their relationship strictly professional? Elsewhere new practice manager Harriet wants to modernize Shoe Lane chambers, both in terms of administration and culture. But the changes are greeted with anger and resentment by head clerk Billy. Alan Cowdrey is made a judge, which means there's an opening for a new head of chambers. Martha, Clive and Caroline Warwick are all in the running, but whoever wins the vote, it will mean radical changes at Shoe Lane...