There's a pet cemetery in town where the dead that are buried there come back to life. So when a couple's infant son is hit by a car and the father buries him in the cemetary... well the dead should stay dead. Which the quickly find out. This movie is creepy.
What can I say...........it's Stephen King at his best.
As with most things in life, once you revisit something- in this case a pet- it's never quite the same.