Two hauntings at the same boarding school, twenty years apart. Can Imogen Croft explain these strange events? Or will her intervention come too late? When Imogen Croft meets local artist Laurie Saunders, newly arrived from London, they immediately become friends. Whilst painting Imogen's portrait for her latest exhibition, Laurie recounts the summer she spent at Marchmont Hall School twenty years before. The story fascinates Imogen so much that she determines to investigate the ghostly visions her friend witnessed there. But by returning to the school, Imogen unlocks dangerous forces that threaten the lives of a young family. Her only option is to find out the truth about the ghost of Marchmont Hall, a decision which leads Imogen deep into a past full of superstition and untold cruelty.