The Haunting of Armitage House

Little Isabella Burnside is fading away, and no matter how many specialists her mother takes her to, they can't pinpoint the problem. 

Her twin brother, Jack—once open and gregarious—can now barely communicate. 

Nobody knows what is wrong with the Burnside twins. They keep talking about ghosts, but their mother will have none of it. "It's just your imagination," she tells them: "just bad dreams."

Isabella's father, desperate to help his children, calls in Lincoln Sweeney and his partner Katie Dyer, paranormal investigators, to see if there is any basis for his children's nightmares. His wife Helena, intent on climbing the social ladder now that they're in their expensive house-with-a-history, is furious: she can see her dreams dissolving before her eyes. 

Then disaster strikes. Lincoln disappears, and his twin, Tara, senses immediately that something unspeakable has happened to him. She races through the night to where he was last seen, and she and his partner Katie set about trying to unravel the mystery. 

Where is Lincoln? Is he on this plane or the next? Is it really a vengeful ghost that has enticed him to a fate worse than death—or is he really dead? 

Blocked at every turn by Helena Burnside, battling to find out the truth, Tara and Katie doggedly keep following the clues until they realise, with horror, just what they are facing.