Sam comes under intense scrutiny during an official inquiry into the deaths of two brothers while they were in prison. Her findings are soon challenged by her colleague, Leo Dalton, who is brought in to perform a second autopsy. Meanwhile, a series of murders that are taking place cast suspicion on a recently released ex-convict. He served years in prison after being convicted of killing his wife; the evidence against him was given by Sam during one of her very first cases. During his time in prison, however, he continued to deny his guilt. Sam begins to believe that someone is stalking her, while the police have trouble locating the ex-convict.

Sam and Leo, colleague Pathologists, are on opposing sides of a high-profile court case.

Questions about a celebrated pathologist's accuracy in past cases leads to several exhumations; Sam Ryan is assigned to reexamine the remains. One particularly brutal murder conviction depends on the time of death being precise. Two crucial witnesses are found: one on her deathbed, anxious to get something off her chest, and the other dead behind a remodeled wall.