Martha takes on the biggest case of her life, defending Mark Draper, a repeat offender on a murder charge at the Old Bailey. However, when the case starts to fall apart, Martha must try to remain focused on the trial as both personal and private pressures escalate. Meanwhile, it is decision time for the pupils, and the fate of chambers hangs in the balance.

Martha prosecutes a teacher accused of assaulting a pupil, but believes he is on too serious a charge and is not being properly defended by her colleague, Noah. Meanwhile, Nick takes on his first major case, and both Martha and Clive have their Silk interviews. Will Martha be able to ensure a fair trial for the teacher at the same time as succeeding in her interview?

In an effort to boost her Silk application, Martha accepts a rape case, against her better judgement. Even worse, Clive is prosecuting her client and delights in riling Martha. As the case draws to a close, Martha begins to realise that things are not always black and white, especially when she makes a startling discovery.

Martha is forced to defend a police officer accused of racism at the police tribunal, at the same time as trying to get bail for another client. In the meantime, pressure increases on the pupils as the tenancy deadline draws near. And Clive receives some astonishing news which could change not only his personal life, but life at chambers for everyone.

Having just won an important case, Martha is given two new cases for the next day, with a chance of getting a good reference for her Silk application. Under huge time pressure, Martha has to prepare overnight. But will she be able to satisfy both the personal and the professional demands placed on her? Or will she be forced to sacrifice one case in order to win the other?

Martha defends a vulnerable teenager and the pupils are given their first opportunity to stand up in court, taking on a low-level magistrates' court case. However, as the cases progress, both Martha and Nick find themselves in challenging positions. Can Martha save her client without endangering not only her silk application, but also her career?