Sam is called after a suspected terrorist attack causes a fire at a hotel and a government minister is injured.

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.

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?