While Sam is giving lectures at the university, a fellow lecturer is found murdered and Sam is called to do the examination. She finds it difficult as she knew the victim, but she still strives to find the answers to unanswered questions.
When a body is found between the blades of a harvesting machine, Sam is called to the scene to examine the body.
At first it looks like an accident, but when the body is re-examined later, a wound is discovered that was not made by the harvester. As Sam delves deeper, she discovers that the case could have something to do with someone's past in Northern Ireland.