It’s fairly bonkers, so here’s a recap:
SPOILERS AHOY!
Family have a kids, one of whom ends up in a mysterious coma. He’s sent home, and then terrifying and ghostly things start to happen. OH NOES!
His family, rather sensibly and contrary to every other family in these sorts of films, move to another house. Unfortunately, things still keep on happening and they end up getting a physic. Turns out that it’s not the house that’s haunted – it’s the son! DUUUN DUUUN DUUUUUN!
At this point it goes a bit bonkers. It turns out the comatose child has the ability to astral project into the afterlife, and the spirits of the dead and demonic forces are trying to nab his body so they can live again.
In another twist, it turns out that SKEPTICAL DAD also had this ability, but his mother and the physic managed to turn it off when he was a child as he was being stalked by the spirit of an old woman in black. He has to have those powers reactivated so he can astral project, find his son and bring him back.
He does it! Great success! Only it’s suggested that something came back with him, possibly possessing him – the old woman from his childhood. The physic ends up dead, having taken a photo just before she died – which shows the old woman. OMG!
Aaand there’s where the sequel starts.