The Here and Now of Yesterday

He's a small-time exorcist who started out as a fake until he met Delilah, Emi's mother, who had the ability to sense the after-images of the departed. They eventually married and had Emi and her older brother, Michel. Delilah died of an illness and Michel disappeared whilst travelling after his graduation. That left Emi and her father.

He was reluctant to get back into the business but Emi had such strong powers that where ever she went she began to see the traces of people who died - mostly their last thoughts impressed apon the landscapes, though the darker the death/person the stronger the impression. She was content to just talk to the after-images until one day she met Michel's and since then she's pushed her father to help her use her powers to help others, despite her young age.

They were called to an old manor that is being knocked down to build a new hotel, due to strange happenings making the workers uneasy, but mostly because the new owner had heard rumours of what used to go on in the manor and wanted to be sure that there'd be no issues with the new building.

Set up in one of the rooms, Emi enters the 'thoughts' of the house to meet the impressions of those left behind. Her powers have grown strong enough that just interacting with the denizens and learning their stories is enough to wrest them free from their bindings to that area... for a short while.

After she checks a place out her father uses rituals to cleanse the area and block the 'ghosts' from ever returning. Bereft of their 'place' in the world, they're free to move on - to where ever the dead spirits go.

Or something to that effect.