Charlotte Hopkins knows that the offer is too good to be true. A room in one of London's most prestigious houses should cost way more than a hundred pounds a month. But the landlady, Diana, seems so nice and friendly, and Charlotte's desperate to stop sleeping on her friend's sofa, so she decides to take the risk. After all, even if there's a catch, how bad can it be? Soon, Charlotte finds herself drawn into the increasingly terrifying world of Diana Cassadine and her twisted family. One year ago, the room's previous occupant – a girl named Katie Leith – died in mysterious circumstances in the street outside the house. On that night, a haunting cry rang through the night air: “You should have seen her!” What really happened to Katie? Are Diana and her family right when they claim that the dead girl's ghost now haunts the house? And how far will they go to contact her spirit and prove that they never meant to hurt her? On one particularly terrifying night, Charlotte Hopkins is going to discover the depths of the family's depravity. Can she survive their clutches? And even if she does, will the ghost of Katie Leith come looking for revenge?