An almighty explosion rips through a classy London hotel causing five fatalities and several casualties, one of whom turns out to be the Minister for Defence Procurement. Initial speculation suggests a terrorist attack until a large sum of cash is found on the Minister's bed.

Sam delves deeper into the case but is undermined by the findings of an independent pathologist, brought in to conduct a second autopsy.

Sam comes under scrutiny at an official inquiry into two prison deaths and an old case Sam worked on 13 years resurfaces.

Sam uncovers a crippling truth about her involvement in a 13-year-old case -did she help convict an innocent man?

The body of a young pregnant sports agent is found in the grounds of her office building. Sam and her team uncover a tragic story of money and corruption.

Following her discovery of the second body and believing the cases to be linked, Sam is sidelined from the investigation as she attempts to get to the truth.

A drug dealer is on trial for a brutal murder. Crucial to the police evidence is the estimated time of death and Sam and her team are invited by the Home Office to re-examine the evidence. Meanwhile, Harry is asked to join the International War Crimes Commission.

The Home Office ask Sam and her team to examine a number of times of death as given by a highly respected and internationally renowned independent pathologist, Peter Sachs.

Leo and Harry follow up their leads to discover an alarming truth. Are Sam and her team being used by the Home Office to drive out Peter Sachs in fear of a costly process?