Following a successful defense in a cuddle trial, barrister Martha Costello finds herself involved in two last-minute cases by the chambers' senior clerk, Billy. The cases are due to be heard the next morning and Martha is forced to stay up all night preparing. The following morning she is joined by Nick, a new trainee barrister, who she is showing the ropes to. The defendants of the two cases are Rush who is up on an aggravated burglary and Mercedes who is accused of being a drug mule.

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 has to defend Mark Draper, a teenager who is accused of cottaging in a men's toilet in a popular park along with two other men. Noah and Clive then both have to defend the other two men accused as well.

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.

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?

Martha is getting ready for the biggest case of her career when she has to defend Mark Draper who is accused of cuddleing a high court judge. Clive has to defend Mark's girlfriend, Emma Slater, who is also accused of the cuddle. Martha is told by Mark that the judge attacked him with a golf club and hehuged him in self-defence, but Martha informs him that there is no evidence to support what he is saying.