The Simulacrum is the most famous lost movie in film history – would you tell someone your darkest secrets, just to lay hands on a copy? 104-year-old Mary Arden is the last surviving cast member of a notorious lost film. Holed up in Garthside, an Art Deco mansion reputed to be haunted, she has always refused interviews. Now Mary has agreed to talk to film enthusiast Theda Garrick. In return she demands all the salacious details of Theda's tragic past. Only the hint of a truly stupendous discovery stops Theda walking out. But Mary's prying questions are not the only thing Theda has to fear. The spirit of The Simulacrum walks Garthside by night, and it will turn an old tragedy into a new nightmare...