Susan Bayliss became notorious when she blew the whistle on her boss, a heart surgeon at a renowned children's hospital. She accused him of negligence, operations were stopped and an inquiry launched. In the end she was the one suspended as a troublemaker.
Now Dr Harry Kent, a medical examiner with the Met Police, has been called out to certify her suicide.
But something about the scene is wrong. Someone held Susan down...
The grieving parents of the children who died demand answers. The hospital is stonewalling. Everyone has secrets - it's up to Harry and DCI Frankie Noble to find out which were worth killing for.