Melinda gives birth to a son who has apparently inherited her gift for seeing spirits, though his gift has an important difference.
When Eli's father suffers a massive heart attack, it prompts a reunion with Eli's mother, dead nearly 10 years but unable to cross over because of a secret she carried with her to the grave.
Supernatural forces threaten Melinda and her son when she investigates a poltergeist in Grandview hospital.
One of Eli's patients thinks he is being haunted by his sister's ghost; Jim and Melinda become concerned about Aiden.
The Headless Horseman, from "The Legend of Sleepy Hollow," haunts Melinda, and she worries when the book mysteriously shows up at Aiden's school.