This is not Ghost. While there are many similarities The Invisible is dulled down for a less mature market.
The story is that of a high school student named Nick (Justin Chatwin) who is killed by another teen and her band of jewel thieves. His spirit does not move on and he attempts to lead people to where his body has been dumped. The best part of the film is the revelation Nick has as he observes his mother (Marsha Gay Harden) from a new perspective. He discovers that she is not the cold authority figure he knew, but a warm living mother who is mourning the loss of her son. As for other characters, they are poorly cast and poorly written. No other characters except Marsha Gay Harden the mother who effectively shows who she is an Academy Award winner.
What is missing is the creeps. We doesn't even get the feeling that anyone affected by Nick's spirit is spooked or creeped out. Were I contacted by a spirit or hear voices, my skin would be crawling. If this were presented with something to fear, it might have passed as a thriller rather than a snoozer.