Henry was 18 years old when he was killed, with a gunshot wound in his chest. In life he was a decent boy from a wealthy, loving family, whose parents believed that he should earn his own living and not rely on their handouts. He masterminded his own kidnapping with a friend of his, and seems relieved to be able to explain to his mother, via Melinda, that he's felt guilt and remorse ever since.
Damon is a graphic (comic) novelist; kind of hip and edgy, he is being haunted by the ghost of a teen boy as he is ready to release his new novel and strange things start to happen to him and the ghost is tormenting him until Melinda can help him find out who is trying to stop his work, while the things the ghost does to Damon are predicted in his comics.