In Hershey, Pa., Bob Curley dies after being rushed to the emergency room with bizarre symptoms; Dauphin County Coroner Graham Hetrick hunts for a strand of evidence to prove whether Curley's exposure to a deadly poison was accidental or murder.

In Harrisburg, Pa., 86-year-old Goldie Snyder is found brutally murdered in her bait shop; her wounds make Dauphine County Coroner Graham Hetrick suspect the killer has done this before and will kill again.

Coroner Graham Hetrick is immediately called to the scene after the decomposed body of Marcus Garner is found abandoned in a Harrisburg, Pa., garage; Graham must use a special science and the common housefly to solve the case.